International Business Machines Corp
InternatioActive Patents
1
Total Holdings
2751
Patent Holdings
Filter in Explorer →| Patent No. | Title | Status | Filing Date | Grant Date | Claims | Actions |
|---|---|---|---|---|---|---|
| FR1542889A | Foldable chamber pump | Active / In Force | — | — | 0 | Details |
| GB2301260A | Voice mail system | Expired / Lapsed | 1995-05-26 | — | 15 | Details |
| EP0660574A2 | Method and apparatus for distribution of arbitrary media | Expired / Lapsed | 1994-11-24 | — | 24 | Details |
| EP0595291A1 | Improved remote center-of-motion robot for surgery | Expired / Lapsed | 1993-10-27 | — | 29 | Details |
| EP0593874A2 | System and method for performing resource reconfiguration i… | Expired / Lapsed | 1993-08-23 | — | 18 | Details |
| JPH0689221A | Method and apparatus for controlling memory in computer sys… | Expired / Lapsed | 1993-02-15 | — | 0 | Details |
| EP0550196A2 | Personal computer with generalized data streaming apparatus… | Expired / Lapsed | 1992-12-14 | — | 15 | Details |
| EP0521610A2 | Digital cellular overlay network | Expired / Lapsed | 1992-05-26 | — | 34 | Details |
| EP0496494A2 | Software maintenance system | Expired / Lapsed | 1992-01-07 | — | 10 | Details |
| EP0456103A2 | Image-directed robotic system for precise surgery | Expired / Lapsed | 1991-05-02 | — | 34 | Details |
| EP0447020A1 | Integrated package having a thermoelectric cooler | Expired / Lapsed | 1991-01-18 | — | 17 | Details |
| EP0351388A2 | Access path optimization using degrees of clustering | Expired / Lapsed | 1989-06-14 | — | 12 | Details |
| EP0363547A1 | Method for etching mirror facets of III-V semiconductor str… | Expired / Lapsed | 1988-09-12 | — | 17 | Details |
| EP0300139A2 | Error correcting code for B-bit-per-chip memory with reduce… | Expired / Lapsed | 1988-04-19 | — | 6 | Details |
| EP0282702A2 | Bifet logic circuit | Expired / Lapsed | 1988-01-26 | — | 16 | Details |
| EP0249091A2 | Parity spreading to enhance storage access | Expired / Lapsed | 1987-05-26 | — | 20 | Details |
| EP0223920A2 | Chem-mech polishing method for producing coplanar metal/ins… | Expired / Lapsed | 1986-07-29 | — | 12 | Details |
| EP0205965A2 | Peripheral subsystem having read/write cache with record ac… | Expired / Lapsed | 1986-05-27 | — | 24 | Details |
| EP0205946A2 | Flexible data transmission for message based protocols | Expired / Lapsed | 1986-05-23 | — | 13 | Details |
| EP0202480A2 | Positioning misaligned disk heads | Expired / Lapsed | 1986-04-18 | — | 8 | Details |
| EP0168699A2 | Electro-optical servo transducer head | Expired / Lapsed | 1985-07-01 | — | 11 | Details |
| EP0121700A2 | Multiprocessor storage serialization apparatus | Expired / Lapsed | 1984-02-20 | — | 8 | Details |
| EP0114952A1 | Controlled braze joining of electronic packaging elements | Expired / Lapsed | 1983-11-08 | — | 11 | Details |
| EP0108255A1 | Self-testing circuitry for a combinatorial and sequential l… | Expired / Lapsed | 1983-10-05 | — | 4 | Details |
| EP0111060A1 | Ablative photodecomposition of organic biological material | Expired / Lapsed | 1983-09-06 | — | 25 | Details |
| EP0076948A2 | Variable resolution interlaced ink jet printer | Expired / Lapsed | 1982-09-22 | — | 12 | Details |
| EP0073303A1 | Process for forming a patterned mask using a positive elect… | Expired / Lapsed | 1982-06-08 | — | 4 | Details |
| EP0055378A2 | A method of brazing adjoining surfaces of elements | Expired / Lapsed | 1981-10-29 | — | 11 | Details |
| EP0051158A1 | Electrically alterable double dense memory | Expired / Lapsed | 1981-10-05 | — | 14 | Details |
| EP0044400A2 | FET memory cell structure and process | Expired / Lapsed | 1981-06-05 | — | 15 | Details |
| EP0042931A2 | Magnetic disk initialization method | Expired / Lapsed | 1981-04-28 | — | 5 | Details |
| EP0012910A1 | Thin film magnetic heads | Expired / Lapsed | 1979-12-10 | — | 6 | Details |
| EP0012912A1 | Thin film magnetic transducers | Expired / Lapsed | 1979-12-10 | — | 7 | Details |
| EP0014231A1 | Information storage apparatus | Expired / Lapsed | 1979-10-29 | — | 31 | Details |
| DE2847393A1 | LINEAR VIBRATING PULSE MOTOR | Expired / Lapsed | 1978-11-02 | — | 0 | Details |
| GB1580869A | Error discriminations in stored data | Expired / Lapsed | 1978-04-19 | — | 16 | Details |
| DE2558979A1 | HIERARCHICAL CONTROL DEVICE FOR A MESSAGE TRANSFER AND MEDI… | Expired / Lapsed | 1975-12-29 | — | 0 | Details |
| DE2558980A1 | DIGITAL SWITCH UNIT FOR INFORMATION SECTIONS | Expired / Lapsed | 1975-12-29 | — | 0 | Details |
| DE2558933A1 | MESSAGE TRANSFER SYSTEM | Expired / Lapsed | 1975-12-29 | — | 0 | Details |
| DE2559006A1 | MESSAGE TRANSMISSION SYSTEM, IN PARTICULAR TELEPHONE AND DA… | Expired / Lapsed | 1975-12-29 | — | 0 | Details |
| DE2558932A1 | SWITCHING NETWORK CONNECTING VIA SATELLITE | Expired / Lapsed | 1975-12-29 | — | 0 | Details |
| DE2460008B2 | EMERGENCY SYSTEM FOR WIRELESS TRANSMISSION OF CODED EMERGEN… | Expired / Lapsed | 1974-12-19 | — | 0 | Details |
| GB1469486A | Testing semiconductor devices | Expired / Lapsed | 1974-05-01 | — | 0 | Details |
| GB1437883A | Ticketing system | Expired / Lapsed | 1974-04-17 | — | 0 | Details |
| GB1433624A | Multi-level interconnection system | Expired / Lapsed | 1973-09-21 | — | 0 | Details |
| DE2344494A1 | VOICE OUTPUT | Expired / Lapsed | 1973-09-04 | — | 0 | Details |
| GB1354827A | Data processing systems | Expired / Lapsed | 1972-05-24 | — | 0 | Details |
| GB1365838A | Data handling system | Expired / Lapsed | 1972-04-21 | — | 0 | Details |
| DE2209136A1 | Control and adaptation circuit for data processing systems | Expired / Lapsed | 1972-02-26 | — | 0 | Details |
| DE2158683A1 | Time division multiplex switch | Expired / Lapsed | 1971-11-26 | — | 0 | Details |
| GB1340220A | Data storage apparatus | Expired / Lapsed | 1971-07-23 | — | 0 | Details |
| DE2112371A1 | Method for the switching of messages within a network | Expired / Lapsed | 1971-03-15 | — | 0 | Details |
| DE2048846A1 | Reactive transfer material and process for its manufacture | Expired / Lapsed | 1970-10-05 | — | 0 | Details |
| DE1965398A1 | Circuit arrangement for the electronic control of the visua… | Expired / Lapsed | 1969-12-30 | — | 0 | Details |
| DE1964009A1 | Arrangement for the transmission of data | Expired / Lapsed | 1969-12-20 | — | 0 | Details |
| GB1007919A | Character reading apparatus | Expired / Lapsed | 1964-08-11 | — | 0 | Details |
| GB1005326A | Improvements in fluid dispensing devices | Expired / Lapsed | 1964-05-26 | — | 0 | Details |
| GB902778A | Improvements in systems for data storage and processing mac… | Expired / Lapsed | 1959-08-28 | — | 0 | Details |
| GB846722A | Improvements in character sensing apparatus | Expired / Lapsed | 1957-04-02 | — | 0 | Details |
| GB769384A | Transformer matrix system | Expired / Lapsed | 1955-05-17 | — | 0 | Details |
| GB760562A | Magnetic core storage apparatus | Expired / Lapsed | 1954-11-24 | — | 0 | Details |
| GB632168A | Improvements in or relating to electrical circuits and elec… | Expired / Lapsed | 1946-09-23 | — | 0 | Details |
| US6829693B2 | Auxiliary storage slot scavenger | Expired / Lapsed | 2001-02-28 | 2004-12-07 | 24 | Details |
| US6732116B2 | Method and system for dynamically managing data structures … | Expired / Lapsed | 2001-06-21 | 2004-05-04 | 23 | Details |
| US6574706B2 | Managing unvirtualized data pages in real storage | Expired / Lapsed | 2001-02-28 | 2003-06-03 | 24 | Details |
| US6574718B2 | Excessive spin detection and avoidance for systems using a … | Expired / Lapsed | 2001-02-28 | 2003-06-03 | 14 | Details |
| US6574679B1 | Method and apparatus for identifying hardware | Expired / Lapsed | 1999-07-26 | 2003-06-03 | 12 | Details |
| US6473488B2 | Three dimensional image reconstruction from single plane X-… | Expired / Lapsed | 2000-12-20 | 2002-10-29 | 23 | Details |
| US6470070B2 | Image reconstruction using multiple X-ray projections | Expired / Lapsed | 2000-12-20 | 2002-10-22 | 20 | Details |
| US6353845B1 | Computer system, program product and method for tracking as… | Expired / Lapsed | 1998-06-25 | 2002-03-05 | 28 | Details |
| US6345376B1 | Method and means for computationally efficient on-the-fly e… | Expired / Lapsed | 2000-07-18 | 2002-02-05 | 9 | Details |
| US6289432B1 | Sharing segments of storage by enabling the sharing of page… | Expired / Lapsed | 1998-03-25 | 2001-09-11 | 46 | Details |
| US6286080B1 | Advanced read cache emulation | Expired / Lapsed | 1999-02-16 | 2001-09-04 | 25 | Details |
| US6223244B1 | Method for assuring device access to a bus having a fixed p… | Expired / Lapsed | 1998-12-10 | 2001-04-24 | 27 | Details |
| US6201984B1 | System and method for augmentation of endoscopic surgery | Expired / Lapsed | 1995-01-26 | 2001-03-13 | 58 | Details |
| US6115616A | Hand held telephone set with separable keyboard | Expired / Lapsed | 1998-05-28 | 2000-09-05 | 12 | Details |
| US6038181A | Efficient semiconductor burn-in circuit and method of opera… | Expired / Lapsed | 1998-08-18 | 2000-03-14 | 13 | Details |
| US5976156A | Stereotaxic apparatus and method for moving an end effector | Expired / Lapsed | 1993-11-02 | 1999-11-02 | 29 | Details |
| US5951475A | Methods and apparatus for registering CT-scan data to multi… | Expired / Lapsed | 1997-09-25 | 1999-09-14 | 39 | Details |
| US5926818A | Relational database implementation of a multi-dimensional d… | Expired / Lapsed | 1997-06-30 | 1999-07-20 | 18 | Details |
| US5887121A | Method of constrained Cartesian control of robotic mechanis… | Expired / Lapsed | 1997-07-17 | 1999-03-23 | 11 | Details |
| US5884056A | Method and system for video browsing on the world wide web | Expired / Lapsed | 1995-12-28 | 1999-03-16 | 22 | Details |
| US5872797A | Burn-in signal pattern generator | Expired / Lapsed | 1996-12-02 | 1999-02-16 | 21 | Details |
| US5870537A | Concurrent switch to shadowed device for storage controller… | Expired / Lapsed | 1996-03-13 | 1999-02-09 | 24 | Details |
| US5855802A | Method and apparatus for forming a tubular article having a… | Expired / Lapsed | 1996-05-30 | 1999-01-05 | 11 | Details |
| US5819063A | Method and data processing system for emulating a program | Expired / Lapsed | 1995-09-11 | 1998-10-06 | 22 | Details |
| US5819022A | Method for re-executing a process on a computer system for … | Expired / Lapsed | 1995-08-15 | 1998-10-06 | 12 | Details |
| US5796383A | Method and system for presenting contents of a container ob… | Expired / Lapsed | 1995-08-07 | 1998-08-18 | 21 | Details |
| US5749362A | Method of creating an image of an anatomical feature where … | Expired / Lapsed | 1995-01-26 | 1998-05-12 | 4 | Details |
| US5745422A | Cross-coupled bitline segments for generalized data propaga… | Expired / Lapsed | 1996-11-12 | 1998-04-28 | 33 | Details |
| US5737565A | System and method for diallocating stream from a stream buf… | Expired / Lapsed | 1995-08-24 | 1998-04-07 | 28 | Details |
| US5727129A | Network system for profiling and actively facilitating user… | Expired / Lapsed | 1996-06-04 | 1998-03-10 | 25 | Details |
| US5705223A | Method and apparatus for coating a semiconductor wafer | Expired / Lapsed | 1995-12-05 | 1998-01-06 | 28 | Details |
| US5630431A | System and method for augmentation of surgery | Expired / Lapsed | 1994-10-11 | 1997-05-20 | 7 | Details |
| US5608890A | Data set level cache optimization | Expired / Lapsed | 1995-04-06 | 1997-03-04 | 13 | Details |
| JP2536989B2 | Liquid film interface cooling chuck for semiconductor wafer… | Expired / Lapsed | 1991-07-25 | 1996-09-25 | 0 | Details |
| US5555385A | Allocation of address spaces within virtual machine compute… | Expired / Lapsed | 1993-10-27 | 1996-09-10 | 34 | Details |
| US5488701A | In log sparing for log structured arrays | Expired / Lapsed | 1994-11-17 | 1996-01-30 | 33 | Details |
| US5479415A | Method and apparatus for generating test pulses | Expired / Lapsed | 1994-03-10 | 1995-12-26 | 17 | Details |
| US5452090A | CCD based confocal filtering for improved accuracy in x-ray… | Expired / Lapsed | 1994-04-22 | 1995-09-19 | 14 | Details |
| US5445166A | System for advising a surgeon | Expired / Lapsed | 1994-04-06 | 1995-08-29 | 16 | Details |
| US5432849A | Secure cryptographic operations using control vectors gener… | Expired / Lapsed | 1993-08-10 | 1995-07-11 | 17 | Details |
| US5417210A | System and method for augmentation of endoscopic surgery | Expired / Lapsed | 1992-05-27 | 1995-05-23 | 20 | Details |
| US5408528A | Method and apparatus for flexible and optimal telephone cal… | Expired / Lapsed | 1994-06-16 | 1995-04-18 | 30 | Details |
| US5408409A | Image-directed robotic system for precise robotic surgery i… | Expired / Lapsed | 1993-12-20 | 1995-04-18 | 13 | Details |
| US5402801A | System and method for augmentation of surgery | Expired / Lapsed | 1994-04-28 | 1995-04-04 | 14 | Details |
| US5394539A | Method and apparatus for rapid data copying using reassigne… | Expired / Lapsed | 1994-07-15 | 1995-02-28 | 23 | Details |
| US5386559A | Variant domains and variant maps in a versioned database ma… | Expired / Lapsed | 1992-07-16 | 1995-01-31 | 11 | Details |
| US5375091A | Method and apparatus for memory dynamic burn-in and test | Expired / Lapsed | 1993-12-08 | 1994-12-20 | 24 | Details |
| US5360445A | Blood pump actuator | Expired / Lapsed | 1991-11-06 | 1994-11-01 | 20 | Details |
| US5355472A | System for substituting tags for non-editable data sets in … | Expired / Lapsed | 1990-11-19 | 1994-10-11 | 18 | Details |
| US5353202A | Personal computer with shielding of input/output signals | Expired / Lapsed | 1994-01-24 | 1994-10-04 | 11 | Details |
| US5335344A | Method for inserting new machine instructions into preexist… | Expired / Lapsed | 1992-11-02 | 1994-08-02 | 11 | Details |
| US5334281A | Method of forming thin silicon mesas having uniform thickne… | Expired / Lapsed | 1992-04-30 | 1994-08-02 | 12 | Details |
| US5335341A | Dump analysis system and method in data processing systems | Expired / Lapsed | 1991-03-19 | 1994-08-02 | 12 | Details |
| US5333266A | Method and apparatus for message handling in computer syste… | Expired / Lapsed | 1992-03-27 | 1994-07-26 | 42 | Details |
| US5333285A | System crash detect and automatic reset mechanism for proce… | Expired / Lapsed | 1991-11-21 | 1994-07-26 | 16 | Details |
| US5317728A | Storage management of a first file system using a second fi… | Expired / Lapsed | 1990-09-07 | 1994-05-31 | 8 | Details |
| US5301302A | Memory mapping and special write detection in a system and … | Expired / Lapsed | 1991-04-02 | 1994-04-05 | 19 | Details |
| US5285453A | Test pattern generator for testing embedded arrays | Expired / Lapsed | 1990-12-28 | 1994-02-08 | 8 | Details |
| US5276876A | Registration of resources for commit procedures | Expired / Lapsed | 1990-05-16 | 1994-01-04 | 18 | Details |
| US5262346A | Nitride polish stop for forming SOI wafers | Expired / Lapsed | 1992-12-16 | 1993-11-16 | 11 | Details |
| US5262847A | Method of converting luminance-color difference video signa… | Expired / Lapsed | 1992-10-20 | 1993-11-16 | 18 | Details |
| US5246884A | Cvd diamond or diamond-like carbon for chemical-mechanical … | Expired / Lapsed | 1991-10-30 | 1993-09-21 | 26 | Details |
| US5239647A | Data storage hierarchy with shared storage level | Expired / Lapsed | 1990-09-07 | 1993-08-24 | 10 | Details |
| US5237682A | File management system for a computer | Expired / Lapsed | 1991-09-27 | 1993-08-17 | 13 | Details |
| US5225888A | Plasma constituent analysis by interferometric techniques | Expired / Lapsed | 1990-12-26 | 1993-07-06 | 11 | Details |
| US5218696A | Method for dynamically expanding and rapidly accessing file… | Expired / Lapsed | 1992-09-17 | 1993-06-08 | 12 | Details |
| US5218584A | Integrated optical head structure | Expired / Lapsed | 1991-10-28 | 1993-06-08 | 37 | Details |
| US5210485A | Probe for wafer burn-in test system | Expired / Lapsed | 1991-07-26 | 1993-05-11 | 27 | Details |
| US5204280A | Process for fabricating multiple pillars inside a dram tren… | Expired / Lapsed | 1992-04-09 | 1993-04-20 | 7 | Details |
| US5204947A | Application independent (open) hypermedia enablement servic… | Expired / Lapsed | 1990-10-31 | 1993-04-20 | 54 | Details |
| US5202971A | System for file and record locking between nodes in a distr… | Expired / Lapsed | 1990-12-17 | 1993-04-13 | 30 | Details |
| US5198995A | Trench-capacitor-one-transistor storage cell and array for … | Expired / Lapsed | 1990-10-30 | 1993-03-30 | 9 | Details |
| US5151987A | Recovery objects in an object oriented computing environment | Expired / Lapsed | 1990-10-23 | 1992-09-29 | 35 | Details |
| US5138118A | Pulsed pen for use with a digitizer tablet | Expired / Lapsed | 1991-05-06 | 1992-08-11 | 30 | Details |
| US5126006A | Plural level chip masking | Expired / Lapsed | 1991-05-31 | 1992-06-30 | 37 | Details |
| US5121489A | Tracing method for identifying program execution paths usin… | Expired / Lapsed | 1991-06-27 | 1992-06-09 | 3 | Details |
| US5089952A | Method for allowing weak searchers to access pointer-connec… | Expired / Lapsed | 1988-10-07 | 1992-02-18 | 12 | Details |
| US5086387A | Multi-frequency clock generation with low state coincidence… | Expired / Lapsed | 1988-05-27 | 1992-02-04 | 20 | Details |
| US5078619A | Coaxial cable terminal | Expired / Lapsed | 1991-06-17 | 1992-01-07 | 11 | Details |
| US5072126A | Promixity alignment using polarized illumination and double… | Expired / Lapsed | 1990-10-31 | 1991-12-10 | 8 | Details |
| US5067073A | Embedded tracing method for identifying program executed pa… | Expired / Lapsed | 1988-08-02 | 1991-11-19 | 6 | Details |
| US5065279A | Integral protective enclosure for tab or similar delicate a… | Expired / Lapsed | 1990-08-16 | 1991-11-12 | 12 | Details |
| US5064681A | Selective deposition process for physical vapor deposition | Expired / Lapsed | 1989-06-08 | 1991-11-12 | 20 | Details |
| EP0248248B1 | Method for making a substantially planar construction of re… | Expired / Lapsed | 1987-05-15 | 1991-08-07 | 13 | Details |
| US5032979A | Distributed security auditing subsystem for an operating sy… | Expired / Lapsed | 1990-06-22 | 1991-07-16 | 12 | Details |
| US5018060A | Allocating data storage space of peripheral data storage de… | Expired / Lapsed | 1989-01-26 | 1991-05-21 | 13 | Details |
| US4999699A | Solder interconnection structure and process for making | Expired / Lapsed | 1990-03-14 | 1991-03-12 | 22 | Details |
| US4999280A | Spray silylation of photoresist images | Expired / Lapsed | 1989-03-17 | 1991-03-12 | 10 | Details |
| US4993069A | Secure key management using control vector translation | Expired / Lapsed | 1989-11-29 | 1991-02-12 | 26 | Details |
| US4987533A | Method of managing data in a data storage hierarchy and a d… | Expired / Lapsed | 1988-05-05 | 1991-01-22 | 19 | Details |
| US4969259A | Pin with tubular elliptical compliant portion and method fo… | Expired / Lapsed | 1988-12-14 | 1990-11-13 | 15 | Details |
| US4956313A | Via-filling and planarization technique | Expired / Lapsed | 1988-10-11 | 1990-09-11 | 12 | Details |
| US4956638A | Display using ordered dither | Expired / Lapsed | 1988-09-16 | 1990-09-11 | 10 | Details |
| US4951229A | Apparatus and method for managing multiple images in a grap… | Expired / Lapsed | 1988-07-22 | 1990-08-21 | 10 | Details |
| US4948629A | Deposition of diamond films | Expired / Lapsed | 1989-02-10 | 1990-08-14 | 9 | Details |
| US4944836A | Chem-mech polishing method for producing coplanar metal/ins… | Expired / Lapsed | 1985-10-28 | 1990-07-31 | 12 | Details |
| US4941176A | Secure management of keys using control vectors | Expired / Lapsed | 1988-08-11 | 1990-07-10 | 70 | Details |
| US4914725A | Transducer positioning servo mechanisms employing digital a… | Expired / Lapsed | 1989-07-10 | 1990-04-03 | 33 | Details |
| US4914569A | Method for concurrent record access, insertion, deletion an… | Expired / Lapsed | 1987-10-30 | 1990-04-03 | 14 | Details |
| US4587163B1 | US4587163B1 - - Google Patents | Expired / Lapsed | 1984-11-01 | 1990-04-03 | 0 | Details |
| US4910574A | Porous circuit macro for semiconductor integrated circuits | Expired / Lapsed | 1989-02-23 | 1990-03-20 | 23 | Details |
| US4907150A | Apparatus and method for suspending and resuming software a… | Expired / Lapsed | 1988-07-26 | 1990-03-06 | 22 | Details |
| US4897781A | System and method for using cached data at a local node aft… | Expired / Lapsed | 1987-02-13 | 1990-01-30 | 22 | Details |
| US4890098A | Flexible window management on a computer display | Expired / Lapsed | 1987-10-20 | 1989-12-26 | 7 | Details |
| US4878167A | Method for managing reuse of hard log space by mapping log … | Expired / Lapsed | 1986-06-30 | 1989-10-31 | 7 | Details |
| US4876114A | Process for the self fractionation deposition of a metallic… | Expired / Lapsed | 1988-08-29 | 1989-10-24 | 8 | Details |
| US4870635A | Precision measurement and positioning system for disk stora… | Expired / Lapsed | 1986-09-19 | 1989-09-26 | 25 | Details |
| US4864516A | Method for implementing an on-line presentation in an infor… | Expired / Lapsed | 1986-03-10 | 1989-09-05 | 8 | Details |
| US4841476A | Extended floating point operations supporting emulation of … | Expired / Lapsed | 1986-10-06 | 1989-06-20 | 8 | Details |
| US4827411A | Method of maintaining a topology database | Expired / Lapsed | 1987-06-15 | 1989-05-02 | 7 | Details |
| US4810601A | Top imaged resists | Expired / Lapsed | 1986-06-30 | 1989-03-07 | 30 | Details |
| US4807195A | Apparatus and method for providing a dual sense amplifier w… | Expired / Lapsed | 1987-05-18 | 1989-02-21 | 29 | Details |
| US4791631A | Wide tolerance, modulated blue laser source | Expired / Lapsed | 1987-08-31 | 1988-12-13 | 45 | Details |
| US4789598A | Thin film medium for horizontal magnetic recording having a… | Expired / Lapsed | 1987-01-20 | 1988-12-06 | 5 | Details |
| US4787404A | Low flow rate-low pressure atomizer device | Expired / Lapsed | 1987-06-12 | 1988-11-29 | 8 | Details |
| US4784447A | Holographic objective mirror for optical storage | Expired / Lapsed | 1987-03-13 | 1988-11-15 | 2 | Details |
| US4771366A | Ceramic card assembly having enhanced power distribution an… | Expired / Lapsed | 1987-07-06 | 1988-09-13 | 14 | Details |
| US4771375A | Managing data storage devices connected to a digital comput… | Expired / Lapsed | 1986-09-15 | 1988-09-13 | 11 | Details |
| US4769786A | Two square memory cells | Expired / Lapsed | 1986-07-15 | 1988-09-06 | 30 | Details |
| US4766670A | Full panel electronic packaging structure and method of mak… | Expired / Lapsed | 1987-02-02 | 1988-08-30 | 7 | Details |
| US4766566A | Performance enhancement scheme for a RISC type VLSI process… | Expired / Lapsed | 1986-08-18 | 1988-08-23 | 21 | Details |
| US4764955A | Process for determining an echo path flat delay and echo ca… | Expired / Lapsed | 1986-10-16 | 1988-08-16 | 8 | Details |
| US4761737A | Method to automatically increase the segment size of unix f… | Expired / Lapsed | 1986-01-16 | 1988-08-02 | 12 | Details |
| US4757463A | Fault isolation for vehicle using a multifunction test probe | Expired / Lapsed | 1986-06-02 | 1988-07-12 | 7 | Details |
| US4752876A | Self service terminal for lodging industry including room k… | Expired / Lapsed | 1985-06-14 | 1988-06-21 | 15 | Details |
| US4744008A | Flexible film chip carrier with decoupling capacitors | Expired / Lapsed | 1987-09-11 | 1988-05-10 | 18 | Details |
| US4743943A | Renewable fuser wick | Expired / Lapsed | 1987-01-12 | 1988-05-10 | 37 | Details |
| US4742447A | Method to control I/O accesses in a multi-tasking virtual m… | Expired / Lapsed | 1986-01-16 | 1988-05-03 | 20 | Details |
| US4742450A | Method to share copy on write segment for mapped files | Expired / Lapsed | 1986-01-16 | 1988-05-03 | 7 | Details |
| US4734046A | Coaxial converter with resilient terminal | Expired / Lapsed | 1986-03-14 | 1988-03-29 | 20 | Details |
| US4729533A | Support apparatus | Expired / Lapsed | 1987-03-27 | 1988-03-08 | 48 | Details |
| US4730249A | Method to operate on large segments of data in a virtual me… | Expired / Lapsed | 1986-01-16 | 1988-03-08 | 11 | Details |
| US4723211A | Editing of a superblock data structure | Expired / Lapsed | 1984-08-30 | 1988-02-02 | 6 | Details |
| US4723209A | Flow attribute for text objects | Expired / Lapsed | 1984-08-30 | 1988-02-02 | 7 | Details |
| US4714992A | Communication for version management in a distributed infor… | Expired / Lapsed | 1985-11-26 | 1987-12-22 | 13 | Details |
| US4713140A | Laser luminescence monitor for material thickness | Expired / Lapsed | 1987-03-02 | 1987-12-15 | 41 | Details |
| US4699469A | Liquid crystal display | Expired / Lapsed | 1985-04-17 | 1987-10-13 | 7 | Details |
| US4694433A | Semiconductor memory having subarrays and partial word lines | Expired / Lapsed | 1985-04-04 | 1987-09-15 | 7 | Details |
| US4688063A | Dynamic ram cell with MOS trench capacitor in CMOS | Expired / Lapsed | 1986-10-21 | 1987-08-18 | 53 | Details |
| US4684206A | Light waveguide with a submicron aperture, method for manuf… | Expired / Lapsed | 1983-12-20 | 1987-08-04 | 13 | Details |
| US4674065A | System for detecting and correcting contextual errors in a … | Expired / Lapsed | 1985-12-10 | 1987-06-16 | 7 | Details |
| US4674040A | Merging of documents | Expired / Lapsed | 1984-12-26 | 1987-06-16 | 6 | Details |
| US4655769A | Ultra-high-molecular-weight polyethylene products including… | Expired / Lapsed | 1985-12-18 | 1987-04-07 | 49 | Details |
| US4654721A | System for reproducing multi-level digital images on a bi-l… | Expired / Lapsed | 1985-04-12 | 1987-03-31 | 10 | Details |
| US4648031A | Method and apparatus for restarting a computing system | Expired / Lapsed | 1982-06-21 | 1987-03-03 | 19 | Details |
| US4644237A | Collision avoidance system | Expired / Lapsed | 1985-10-17 | 1987-02-17 | 19 | Details |
| US4644432A | Three pole single element magnetic read/write head | Expired / Lapsed | 1985-01-28 | 1987-02-17 | 11 | Details |
| US4644344A | Electrochromic matrix display | Expired / Lapsed | 1984-12-12 | 1987-02-17 | 7 | Details |
| US4644493A | Implementing a shared higher level of privilege on personal… | Expired / Lapsed | 1984-09-14 | 1987-02-17 | 11 | Details |
| US4642790A | Presentation space management and viewporting on a multifun… | Expired / Lapsed | 1984-03-14 | 1987-02-10 | 15 | Details |
| US4639919A | Distributed pattern generator | Expired / Lapsed | 1983-12-19 | 1987-01-27 | 25 | Details |
| US4638427A | Performance evaluation for an asymmetric multiprocessor sys… | Expired / Lapsed | 1984-04-16 | 1987-01-20 | 17 | Details |
| US4638424A | Managing data storage devices connected to a digital comput… | Expired / Lapsed | 1984-01-12 | 1987-01-20 | 16 | Details |
| US4632883A | Vertical recording medium with improved perpendicular magne… | Expired / Lapsed | 1985-04-22 | 1986-12-30 | 7 | Details |
| US4633394A | Distributed arbitration for multiple processors | Expired / Lapsed | 1984-04-24 | 1986-12-30 | 22 | Details |
| US4633387A | Load balancing in a multiunit system | Expired / Lapsed | 1983-02-25 | 1986-12-30 | 11 | Details |
| US4630267A | Programmable timing and synchronization circuit for a TDMA … | Expired / Lapsed | 1984-12-10 | 1986-12-16 | 16 | Details |
| US4625176A | Electrostatic probe | Expired / Lapsed | 1983-09-13 | 1986-11-25 | 7 | Details |
| US4616218A | Adjustable CRT display | Expired / Lapsed | 1983-01-03 | 1986-10-07 | 12 | Details |
| US4614629A | Rotational compression process for forming liquid crystalli… | Expired / Lapsed | 1984-01-27 | 1986-09-30 | 5 | Details |
| US4613731A | Method of cancelling listener echo in a digital data receiv… | Expired / Lapsed | 1982-07-29 | 1986-09-23 | 7 | Details |
| US4611272A | Key-accessed file organization | Expired / Lapsed | 1983-02-03 | 1986-09-09 | 19 | Details |
| US4608669A | Self contained array timing | Expired / Lapsed | 1984-05-18 | 1986-08-26 | 13 | Details |
| US4605354A | Slip sensitive robot gripper system | Expired / Lapsed | 1984-07-30 | 1986-08-12 | 8 | Details |
| US4604694A | Shared and exclusive access control | Expired / Lapsed | 1983-12-14 | 1986-08-05 | 28 | Details |
| US4602981A | Monitoring technique for plasma etching | Expired / Lapsed | 1985-05-06 | 1986-07-29 | 7 | Details |
| US4593363A | Simultaneous placement and wiring for VLSI chips | Expired / Lapsed | 1983-08-12 | 1986-06-03 | 18 | Details |
| US4592628A | Mirror array light valve | Expired / Lapsed | 1981-07-01 | 1986-06-03 | 3 | Details |
| US4589112A | System for multiple error detection with single and double … | Expired / Lapsed | 1984-01-26 | 1986-05-13 | 6 | Details |
| US4589065A | Mechanism for implementing one machine cycle executable tra… | Expired / Lapsed | 1983-06-30 | 1986-05-13 | 9 | Details |
| US4587163A | Preparation of ultra high molecular weight polyethylene mor… | Expired / Lapsed | 1984-11-01 | 1986-05-06 | 31 | Details |
| US4587612A | Accelerated instruction mapping external to source and targ… | Expired / Lapsed | 1982-10-22 | 1986-05-06 | 12 | Details |
| US4581566A | System for automatically calibrating a robot | Expired / Lapsed | 1984-07-09 | 1986-04-08 | 10 | Details |
| US4577968A | Method and arrangement for optical distance measurement | Expired / Lapsed | 1985-01-24 | 1986-03-25 | 19 | Details |
| US4577508A | Optical vibration analyzer | Expired / Lapsed | 1984-10-24 | 1986-03-25 | 10 | Details |
| US4568632A | Patterning of polyimide films with far ultraviolet light | Expired / Lapsed | 1983-12-14 | 1986-02-04 | 25 | Details |
| US4569016A | Mechanism for implementing one machine cycle executable mas… | Expired / Lapsed | 1983-06-30 | 1986-02-04 | 12 | Details |
| US4555773A | Printing with a data stream including merged graphic and al… | Expired / Lapsed | 1983-05-11 | 1985-11-26 | 17 | Details |
| US4555700A | Internal image and bit array for display and printing of gr… | Expired / Lapsed | 1983-05-11 | 1985-11-26 | 5 | Details |
| US4555767A | Method and apparatus for measuring thickness of epitaxial l… | Expired / Lapsed | 1982-05-27 | 1985-11-26 | 20 | Details |
| US4554182A | Method for conditioning a surface of a dielectric substrate… | Expired / Lapsed | 1985-01-31 | 1985-11-19 | 49 | Details |
| US4554593A | Universal thresholder/discriminator | Expired / Lapsed | 1982-08-18 | 1985-11-19 | 35 | Details |
| US4551192A | Electrostatic or vacuum pinchuck formed with microcircuit l… | Expired / Lapsed | 1983-06-30 | 1985-11-05 | 33 | Details |
| US4539506A | Red-emitting superlinear phosphor | Expired / Lapsed | 1983-09-19 | 1985-09-03 | 10 | Details |
| US4539677A | Multiple access data communication system | Expired / Lapsed | 1983-07-28 | 1985-09-03 | 13 | Details |
| US4528659A | Interleaved digital data and voice communications system ap… | Expired / Lapsed | 1981-12-17 | 1985-07-09 | 14 | Details |
| US4528624A | Method and apparatus for allocating memory space based upon… | Expired / Lapsed | 1981-03-25 | 1985-07-09 | 11 | Details |
| US4526631A | Method for forming a void free isolation pattern utilizing … | Expired / Lapsed | 1984-06-25 | 1985-07-02 | 11 | Details |
| US4527285A | Pluggable terminal architecture | Expired / Lapsed | 1982-03-29 | 1985-07-02 | 14 | Details |
| US4520570A | Piezoelectric x-y-positioner | Expired / Lapsed | 1983-12-30 | 1985-06-04 | 7 | Details |
| US4518910A | Buckling beam twist probe contactor assembly with spring bi… | Expired / Lapsed | 1983-06-30 | 1985-05-21 | 9 | Details |
| US4511911A | Dense dynamic memory cell structure and process | Expired / Lapsed | 1981-07-22 | 1985-04-16 | 11 | Details |
| US4503497A | System for independent cache-to-cache transfer | Expired / Lapsed | 1982-05-27 | 1985-03-05 | 36 | Details |
| US4495559A | Optimization of an organization of many discrete elements | Expired / Lapsed | 1981-11-02 | 1985-01-22 | 8 | Details |
| US4494189A | Method and means for switching system control of CPUs | Expired / Lapsed | 1982-04-26 | 1985-01-15 | 26 | Details |
| US4491909A | Data processing system having shared memory | Expired / Lapsed | 1982-02-22 | 1985-01-01 | 7 | Details |
| US4484292A | High speed machine for the physical design of very large sc… | Expired / Lapsed | 1981-06-12 | 1984-11-20 | 10 | Details |
| US4482999A | Method of transmitting information between stations attache… | Expired / Lapsed | 1981-12-01 | 1984-11-13 | 14 | Details |
| US4480304A | Method and means for the retention of locks across system, … | Expired / Lapsed | 1980-10-06 | 1984-10-30 | 11 | Details |
| US4478677A | Laser induced dry etching of vias in glass with non-contact… | Expired / Lapsed | 1983-12-22 | 1984-10-23 | 23 | Details |
| US4479179A | Synchronous cycle steal mechanism for transferring data bet… | Expired / Lapsed | 1981-10-13 | 1984-10-23 | 4 | Details |
| US4477902A | Testing method for assuring AC performance of high performa… | Expired / Lapsed | 1982-06-18 | 1984-10-16 | 16 | Details |
| US4477819A | Optical recording medium | Expired / Lapsed | 1982-06-14 | 1984-10-16 | 8 | Details |
| US4476536A | Digital sine wave synthesizing method and apparatus | Expired / Lapsed | 1981-12-17 | 1984-10-09 | 6 | Details |
| US4476524A | Page storage control methods and means | Expired / Lapsed | 1981-07-02 | 1984-10-09 | 28 | Details |
| US4470874A | Planarization of multi-level interconnected metallization s… | Expired / Lapsed | 1983-12-15 | 1984-09-11 | 33 | Details |
| US4462462A | Thermal conduction piston for semiconductor packages | Expired / Lapsed | 1981-11-17 | 1984-07-31 | 15 | Details |
| US4462040A | Single electrode U-MOSFET random access memory | Expired / Lapsed | 1980-03-30 | 1984-07-24 | 5 | Details |
| US4458985A | Optical fiber connector | Expired / Lapsed | 1981-10-16 | 1984-07-10 | 11 | Details |
| US4458345A | Process for optical information storage | Expired / Lapsed | 1982-03-31 | 1984-07-03 | 6 | Details |
| US4458280A | Servo writing transducer design and writing method | Expired / Lapsed | 1982-01-18 | 1984-07-03 | 7 | Details |
| US4458333A | Dot matrix character printing using constrained memory | Expired / Lapsed | 1981-12-21 | 1984-07-03 | 6 | Details |
| US4456973A | Automatic text grade level analyzer for a text processing s… | Expired / Lapsed | 1982-04-30 | 1984-06-26 | 18 | Details |
| US4456995A | Apparatus for high speed fault mapping of large memories | Expired / Lapsed | 1981-12-17 | 1984-06-26 | 20 | Details |
| US4454576A | Report preparation | Expired / Lapsed | 1981-05-18 | 1984-06-12 | 12 | Details |
| US4452136A | Printer subsystem with dual cooperating microprocessors | Expired / Lapsed | 1979-10-19 | 1984-06-05 | 11 | Details |
| US4445174A | Multiprocessing system including a shared cache | Expired / Lapsed | 1981-03-31 | 1984-04-24 | 29 | Details |
| US4442487A | Three level memory hierarchy using write and share flags | Expired / Lapsed | 1981-12-31 | 1984-04-10 | 15 | Details |
| US4441785A | Rotary fiber optic switch | Expired / Lapsed | 1981-10-29 | 1984-04-10 | 5 | Details |
| US4439828A | Instruction substitution mechanism in an instruction handli… | Expired / Lapsed | 1981-07-27 | 1984-03-27 | 7 | Details |
| EP0054583B1 | Method of transmitting binary data sequences and arrangemen… | Expired / Lapsed | 1980-12-23 | 1984-03-07 | 6 | Details |
| US4435838A | Method and apparatus for tomographical imaging | Expired / Lapsed | 1981-11-16 | 1984-03-06 | 12 | Details |
| US4435759A | Hardware monitor for obtaining processor software/hardware … | Expired / Lapsed | 1981-06-15 | 1984-03-06 | 24 | Details |
| US4434478A | Programming floating gate devices | Expired / Lapsed | 1981-11-27 | 1984-02-28 | 26 | Details |
| US4434475A | Method of entering criteria for selecting records of spatia… | Expired / Lapsed | 1981-05-18 | 1984-02-28 | 7 | Details |
| US4432057A | Method for the dynamic replication of data under distribute… | Expired / Lapsed | 1981-11-27 | 1984-02-14 | 20 | Details |
| US4430153A | Method of forming an RIE etch barrier by in situ conversion… | Expired / Lapsed | 1983-06-30 | 1984-02-07 | 2 | Details |
| US4422144A | Microinstruction substitution mechanism in a control store | Expired / Lapsed | 1981-06-01 | 1983-12-20 | 5 | Details |
| US4417948A | Self developing, photoetching of polyesters by far UV radia… | Expired / Lapsed | 1982-07-09 | 1983-11-29 | 28 | Details |
| US4417946A | Method of making mask for structuring surface areas | Expired / Lapsed | 1982-05-10 | 1983-11-29 | 13 | Details |
| US4414059A | Far UV patterning of resist materials | Expired / Lapsed | 1982-12-09 | 1983-11-08 | 20 | Details |
| US4404609A | Thin film inductive transducer for perpendicular recording | Expired / Lapsed | 1981-10-30 | 1983-09-13 | 11 | Details |
| US4403271A | Apparatus for mounting and packaging data processing devices | Expired / Lapsed | 1980-07-28 | 1983-09-06 | 6 | Details |
| US4401991A | Variable resolution, single array, interlace ink jet printer | Expired / Lapsed | 1981-10-08 | 1983-08-30 | 12 | Details |
| US4400770A | Cache synonym detection and handling means | Expired / Lapsed | 1980-11-10 | 1983-08-23 | 17 | Details |
| US4399506A | Store-in-cache processor means for clearing main storage | Expired / Lapsed | 1980-10-06 | 1983-08-16 | 22 | Details |
| US4399504A | Method and means for the sharing of data resources in a mul… | Expired / Lapsed | 1980-10-06 | 1983-08-16 | 11 | Details |
| US4397018A | Baton passing method and apparatus for maintaining synchron… | Expired / Lapsed | 1980-12-22 | 1983-08-02 | 23 | Details |
| US4393445A | Information-signal recording apparatus employing record vol… | Expired / Lapsed | 1981-03-06 | 1983-07-12 | 6 | Details |
| US4389614A | Method and apparatus for generating pulses of a predetermin… | Expired / Lapsed | 1981-05-18 | 1983-06-21 | 22 | Details |
| US4381453A | System and method for deflecting and focusing a broad ion b… | Expired / Lapsed | 1980-12-31 | 1983-04-26 | 19 | Details |
| US4375600A | Sense amplifier for integrated memory array | Expired / Lapsed | 1981-05-05 | 1983-03-01 | 9 | Details |
| US4373778A | Connector implemented with fiber optic means and site there… | Expired / Lapsed | 1980-12-30 | 1983-02-15 | 24 | Details |
| US4372672A | Self-triggering quality control sensor | Expired / Lapsed | 1980-12-22 | 1983-02-08 | 7 | Details |
| US4371932A | I/O Controller for transferring data between a host process… | Expired / Lapsed | 1981-11-25 | 1983-02-01 | 14 | Details |
| US4371902A | Disk initialization method | Expired / Lapsed | 1980-06-30 | 1983-02-01 | 10 | Details |
| US4371929A | Multiprocessor system with high density memory set architec… | Expired / Lapsed | 1980-05-05 | 1983-02-01 | 17 | Details |
| US4370746A | Memory address selector | Expired / Lapsed | 1980-12-24 | 1983-01-25 | 10 | Details |
| US4365779A | Tilt and rotate apparatus for a display monitor | Expired / Lapsed | 1980-06-16 | 1982-12-28 | 8 | Details |
| US4362977A | Method and apparatus for calibrating a robot to compensate … | Expired / Lapsed | 1980-06-30 | 1982-12-07 | 2 | Details |
| US4363093A | Processor intercommunication system | Expired / Lapsed | 1980-03-10 | 1982-12-07 | 8 | Details |
| US4359816A | Self-aligned metal process for field effect transistor inte… | Expired / Lapsed | 1980-07-08 | 1982-11-23 | 33 | Details |
| US4359286A | Character set expansion | Expired / Lapsed | 1980-11-20 | 1982-11-16 | 10 | Details |
| US4358201A | Interferometric measurement apparatus and method having inc… | Expired / Lapsed | 1980-06-17 | 1982-11-09 | 2 | Details |
| US4357202A | Refractory oxide fabrication | Expired / Lapsed | 1981-06-12 | 1982-11-02 | 7 | Details |
| US4355355A | Address generating mechanism for multiple virtual spaces | Expired / Lapsed | 1980-03-19 | 1982-10-19 | 29 | Details |
| US4353778A | Method of etching polyimide | Expired / Lapsed | 1981-09-04 | 1982-10-12 | 7 | Details |
| US4345314A | Dynamic threshold device | Expired / Lapsed | 1980-11-19 | 1982-08-17 | 7 | Details |
| US4342227A | Planar semiconductor three direction acceleration detecting… | Expired / Lapsed | 1980-12-24 | 1982-08-03 | 16 | Details |
| US4336603A | Three terminal electrically erasable programmable read only… | Expired / Lapsed | 1980-06-18 | 1982-06-22 | 28 | Details |
| US4335426A | Remote processor initialization in a multi-station peer-to-… | Expired / Lapsed | 1980-03-10 | 1982-06-15 | 7 | Details |
| US4335450A | Non-destructive read out field effect transistor memory cel… | Expired / Lapsed | 1980-01-30 | 1982-06-15 | 22 | Details |
| US4334292A | Low voltage electrically erasable programmable read only me… | Expired / Lapsed | 1980-05-27 | 1982-06-08 | 34 | Details |
| US4332028A | Method of measuring the memory address access time (AAT) ut… | Expired / Lapsed | 1980-04-18 | 1982-05-25 | 2 | Details |
| US4332010A | Cache synonym detection and handling mechanism | Expired / Lapsed | 1980-03-17 | 1982-05-25 | 22 | Details |
| US4326332A | Method of making a high density V-MOS memory array | Expired / Lapsed | 1980-07-28 | 1982-04-27 | 11 | Details |
| US4322845A | Demand assignment technique for TDMA satellite communicatio… | Expired / Lapsed | 1979-09-28 | 1982-03-30 | 11 | Details |
| US4317168A | Cache organization enabling concurrent line castout and lin… | Expired / Lapsed | 1979-11-23 | 1982-02-23 | 43 | Details |
| US4314244A | Multiple height proportioned character generation | Expired / Lapsed | 1980-06-16 | 1982-02-02 | 12 | Details |
| US4313161A | Shared storage for multiple processor systems | Expired / Lapsed | 1979-11-13 | 1982-01-26 | 15 | Details |
| US4310883A | Method and apparatus for assigning data sets to virtual vol… | Expired / Lapsed | 1980-02-11 | 1982-01-12 | 32 | Details |
| US4307461A | Call processor for a satellite communications controller | Expired / Lapsed | 1980-03-25 | 1981-12-22 | 15 | Details |
| US4305652A | Merging of information in a copier-printer system | Expired / Lapsed | 1979-11-19 | 1981-12-15 | 20 | Details |
| US4295924A | Method for providing self-aligned conductor in a V-groove d… | Expired / Lapsed | 1979-12-17 | 1981-10-20 | 11 | Details |
| US4296470A | Link register storage and restore system for use in an inst… | Expired / Lapsed | 1979-06-21 | 1981-10-20 | 3 | Details |
| US4294507A | Controllably deformed elastic waveguide elements | Expired / Lapsed | 1980-01-25 | 1981-10-13 | 47 | Details |
| US4294729A | Composition containing alcohol and use thereof for epoxy re… | Expired / Lapsed | 1979-12-17 | 1981-10-13 | 46 | Details |
| US4294510A | Semiconductor fiber optical detection | Expired / Lapsed | 1979-12-10 | 1981-10-13 | 11 | Details |
| US4293910A | Reconfigurable key-in-storage means for protecting interlea… | Expired / Lapsed | 1979-07-02 | 1981-10-06 | 8 | Details |
| US4292623A | Port logic for a communication bus system | Expired / Lapsed | 1979-06-29 | 1981-09-29 | 24 | Details |
| US4291256A | Alignment or correction of energy beam type displays | Expired / Lapsed | 1979-06-11 | 1981-09-22 | 12 | Details |
| US4290084A | Method and means for preserving original continuity/discont… | Expired / Lapsed | 1979-09-21 | 1981-09-15 | 15 | Details |
| US4289719A | Method of making a multi-layer ceramic substrate | Expired / Lapsed | 1976-12-10 | 1981-09-15 | 22 | Details |
| US4282540A | FET Containing stacked gates | Expired / Lapsed | 1979-10-19 | 1981-08-04 | 20 | Details |
| US4280918A | Magnetic particle dispersions | Expired / Lapsed | 1980-03-10 | 1981-07-28 | 8 | Details |
| US4280144A | Coarse scan/fine print algorithm | Expired / Lapsed | 1979-12-03 | 1981-07-21 | 24 | Details |
| US4278493A | Method for cleaning surfaces by ion milling | Expired / Lapsed | 1980-04-28 | 1981-07-14 | 6 | Details |
| US4279023A | Sense latch | Expired / Lapsed | 1979-12-19 | 1981-07-14 | 22 | Details |
| US4276186A | Cleaning composition and use thereof | Expired / Lapsed | 1979-06-26 | 1981-06-30 | 22 | Details |
| US4272200A | Horn loaded piezoelectric matrix printer drive method and a… | Expired / Lapsed | 1978-11-02 | 1981-06-09 | 5 | Details |
| US4263669A | Pattern generation system | Expired / Lapsed | 1979-06-22 | 1981-04-21 | 7 | Details |
| US4260210A | Pluggable module actuation and retention device | Expired / Lapsed | 1979-06-29 | 1981-04-07 | 5 | Details |
| US4256514A | Method for forming a narrow dimensioned region on a body | Expired / Lapsed | 1978-11-03 | 1981-03-17 | 22 | Details |
| US4255772A | Read/write magnetic head assembly with magnetoresistive sen… | Expired / Lapsed | 1979-06-29 | 1981-03-10 | 13 | Details |
| US4251837A | Three decision thresholding mode switch and method for mode… | Expired / Lapsed | 1979-10-16 | 1981-02-17 | 29 | Details |
| US4251841A | Magnetic head slider assembly | Expired / Lapsed | 1979-06-01 | 1981-02-17 | 3 | Details |
| US4250009A | Energetic particle beam deposition system | Expired / Lapsed | 1979-05-18 | 1981-02-10 | 18 | Details |
| US4249217A | Separated sensor array abutment | Expired / Lapsed | 1979-05-29 | 1981-02-03 | 22 | Details |
| US4249193A | LSI Semiconductor device and fabrication thereof | Expired / Lapsed | 1978-05-25 | 1981-02-03 | 32 | Details |
| US4245886A | Fiber optics light switch | Expired / Lapsed | 1979-09-10 | 1981-01-20 | 15 | Details |
| US4238278A | Polycrystalline silicon oxidation method for making shallow… | Expired / Lapsed | 1979-06-14 | 1980-12-09 | 5 | Details |
| US4238853A | Cryptographic communication security for single domain netw… | Expired / Lapsed | 1977-12-05 | 1980-12-09 | 80 | Details |
| US4236946A | Amorphous magnetic thin films with highly stable easy axis | Expired / Lapsed | 1978-03-13 | 1980-12-02 | 59 | Details |
| US4235283A | Multi-stud thermal conduction module | Expired / Lapsed | 1979-12-17 | 1980-11-25 | 10 | Details |
| US4232324A | Apparatus for arranging scanning heads for interlacing | Expired / Lapsed | 1978-06-05 | 1980-11-04 | 18 | Details |
| US4228431A | Electrochromic display device | Expired / Lapsed | 1977-12-13 | 1980-10-14 | 5 | Details |
| US4227178A | Decentralized data transmission system | Expired / Lapsed | 1978-09-21 | 1980-10-07 | 14 | Details |
| US4227253A | Cryptographic communication security for multiple domain ne… | Expired / Lapsed | 1977-12-05 | 1980-10-07 | 62 | Details |
| US4224684A | Receive/bypass circuit for subsystems in polling system | Expired / Lapsed | 1978-09-22 | 1980-09-23 | 8 | Details |
| US4222164A | Method of fabrication of self-aligned metal-semiconductor f… | Expired / Lapsed | 1978-12-29 | 1980-09-16 | 9 | Details |
| US4223403A | Cryptographic architecture for use with a high security per… | Expired / Lapsed | 1978-06-30 | 1980-09-16 | 20 | Details |
| US4220417A | Apparatus for producing preliminary character printout of t… | Expired / Lapsed | 1978-06-08 | 1980-09-02 | 10 | Details |
| US4219855A | Thin film magnetic head | Expired / Lapsed | 1978-12-21 | 1980-08-26 | 11 | Details |
| US4217577A | Character graphics color display system | Expired / Lapsed | 1978-12-11 | 1980-08-12 | 5 | Details |
| US4208081A | Easily reconfigurable data entry terminal | Expired / Lapsed | 1979-01-03 | 1980-06-17 | 8 | Details |
| US4205922A | Font and column format control system | Expired / Lapsed | 1978-03-06 | 1980-06-03 | 8 | Details |
| US4201616A | Dimensionally stable laminated printed circuit cores or boa… | Expired / Lapsed | 1978-06-23 | 1980-05-06 | 7 | Details |
| US4201800A | Hardened photoresist master image mask process | Expired / Lapsed | 1978-04-28 | 1980-05-06 | 2 | Details |
| US4200827A | Positioning system employing feedforward and feedback contr… | Expired / Lapsed | 1977-06-29 | 1980-04-29 | 15 | Details |
| US4198119A | Connector for optical cable | Expired / Lapsed | 1978-09-13 | 1980-04-15 | 16 | Details |
| US4193445A | Conduction cooled module | Expired / Lapsed | 1978-06-29 | 1980-03-18 | 13 | Details |
| US4193082A | Multi-layer dielectric structure | Expired / Lapsed | 1978-06-23 | 1980-03-11 | 13 | Details |
| US4191997A | Circuits and methods for multiple control in data processin… | Expired / Lapsed | 1978-04-10 | 1980-03-04 | 17 | Details |
| US4189770A | Cache bypass control for operand fetches | Expired / Lapsed | 1978-03-16 | 1980-02-19 | 10 | Details |
| US4186871A | Transaction execution system with secure encryption key sto… | Expired / Lapsed | 1978-03-01 | 1980-02-05 | 23 | Details |
| US4186438A | Interactive enquiry system | Expired / Lapsed | 1977-03-16 | 1980-01-29 | 13 | Details |
| US4183657A | Dynamic reference for an image quality control system | Expired / Lapsed | 1978-04-10 | 1980-01-15 | 12 | Details |
| US4182636A | Method of fabricating self-aligned contact vias | Expired / Lapsed | 1978-06-30 | 1980-01-08 | 17 | Details |
| US4181973A | Complex character generator | Expired / Lapsed | 1977-12-23 | 1980-01-01 | 22 | Details |
| US4181952A | Method and means for minimizing error between the manual di… | Expired / Lapsed | 1977-11-21 | 1980-01-01 | 13 | Details |
| US4181934A | Microprocessor architecture with integrated interrupts and … | Expired / Lapsed | 1976-12-27 | 1980-01-01 | 24 | Details |
| US4178095A | Abnormally low reflectance photoconductor sensing system | Expired / Lapsed | 1978-04-10 | 1979-12-11 | 5 | Details |
| US4175275A | R/W Arm that prevents catastrophic failure | Expired / Lapsed | 1978-05-22 | 1979-11-20 | 5 | Details |
| US4170819A | Method of making conductive via holes in printed circuit bo… | Expired / Lapsed | 1978-04-10 | 1979-10-16 | 7 | Details |
| US4171536A | Microprocessor system | Expired / Lapsed | 1977-12-05 | 1979-10-16 | 9 | Details |
| US4165490A | Clock pulse generator with selective pulse delay and pulse … | Expired / Lapsed | 1977-12-19 | 1979-08-21 | 14 | Details |
| US4164668A | Method of correcting the voltage coefficient of resistors i… | Expired / Lapsed | 1977-05-12 | 1979-08-14 | 8 | Details |
| US4159518A | Auto-selection priority circuits for plural channel adapters | Expired / Lapsed | 1977-07-05 | 1979-06-26 | 8 | Details |
| US4158837A | Information display apparatus | Expired / Lapsed | 1977-05-17 | 1979-06-19 | 11 | Details |
| US4157935A | Method for producing nozzle arrays for ink jet printers | Expired / Lapsed | 1977-12-23 | 1979-06-12 | 14 | Details |
| US4157586A | Technique for performing partial stores in store-thru memor… | Expired / Lapsed | 1977-05-05 | 1979-06-05 | 5 | Details |
| US4156745A | Electron sensitive resist and a method preparing the same | Expired / Lapsed | 1978-04-03 | 1979-05-29 | 11 | Details |
| US4156458A | Flexible thermal connector for enhancing conduction cooling | Expired / Lapsed | 1977-05-31 | 1979-05-29 | 7 | Details |
| US4154575A | Hot roll fuser roll closure apparatus | Expired / Lapsed | 1977-08-22 | 1979-05-15 | 8 | Details |
| US4155117A | Synchronizing channel-to-channel adapter | Expired / Lapsed | 1977-07-28 | 1979-05-15 | 14 | Details |
| US4152764A | Floating-priority storage control for processors in a multi… | Expired / Lapsed | 1977-03-16 | 1979-05-01 | 8 | Details |
| US4150400A | Methods of a coarse-scan/fine-print character reproduction … | Expired / Lapsed | 1977-03-31 | 1979-04-17 | 19 | Details |
| US4149184A | Multi-color video display systems using more than one signa… | Expired / Lapsed | 1977-12-02 | 1979-04-10 | 20 | Details |
| US4145181A | Apparatus to facilitate jam recovery and hot roll reversal … | Expired / Lapsed | 1977-09-01 | 1979-03-20 | 6 | Details |
| US4144563A | Microprocessor system | Expired / Lapsed | 1977-11-21 | 1979-03-13 | 12 | Details |
| US4143408A | External selector and internal controller for flexible disc… | Expired / Lapsed | 1977-11-28 | 1979-03-06 | 11 | Details |
| US4142071A | Quantizing process with dynamic allocation of the available… | Expired / Lapsed | 1978-04-10 | 1979-02-27 | 16 | Details |
| US4142234A | Bias filter memory for filtering out unnecessary interrogat… | Expired / Lapsed | 1977-11-28 | 1979-02-27 | 23 | Details |
| US4138644A | Adaptive phase detection method and apparatus | Expired / Lapsed | 1977-11-21 | 1979-02-06 | 18 | Details |
| US4135998A | Method for forming pt-si schottky barrier contact | Expired / Lapsed | 1978-04-26 | 1979-01-23 | 9 | Details |
| US4136386A | Backing store access coordination in a multi-processor syst… | Expired / Lapsed | 1977-10-06 | 1979-01-23 | 15 | Details |
| US4136385A | Synonym control means for multiple virtual storage systems | Expired / Lapsed | 1977-03-24 | 1979-01-23 | 14 | Details |
| US4133011A | Sampled data positioning system employing a model of the ph… | Expired / Lapsed | 1977-12-23 | 1979-01-02 | 31 | Details |
| US4132614A | Etching by sputtering from an intermetallic target to form … | Expired / Lapsed | 1977-10-26 | 1979-01-02 | 34 | Details |
| US4132318A | Asymmetric six-degree-of-freedom force-transducer system fo… | Expired / Lapsed | 1976-12-30 | 1979-01-02 | 17 | Details |
| US4131933A | Quick disconnect card-on-board electronic package assembly | Expired / Lapsed | 1977-04-29 | 1978-12-26 | 2 | Details |
| US4129853A | Method and apparatus for producing compensated signals for … | Expired / Lapsed | 1977-09-26 | 1978-12-12 | 25 | Details |
| US4125873A | Display compressed image refresh system | Expired / Lapsed | 1977-06-29 | 1978-11-14 | 26 | Details |
| US4124870A | Method for improving print quality of coarse-scan/fine-prin… | Expired / Lapsed | 1977-03-31 | 1978-11-07 | 13 | Details |
| US4123747A | Identity verification method and apparatus | Expired / Lapsed | 1977-05-20 | 1978-10-31 | 11 | Details |
| USD250022S | Keyboard enclosure for data processing equipment | Expired / Lapsed | 1977-04-07 | 1978-10-24 | 1 | Details |
| US4113614A | Automated hemodialysis treatment systems | Expired / Lapsed | 1976-12-10 | 1978-09-12 | 32 | Details |
| US4110830A | Channel storage adapter | Expired / Lapsed | 1977-07-05 | 1978-08-29 | 8 | Details |
| US4110837A | Apparatus for the sorting of records overlapped with loadin… | Expired / Lapsed | 1976-12-30 | 1978-08-29 | 8 | Details |
| US4104086A | Method for forming isolated regions of silicon utilizing re… | Expired / Lapsed | 1977-08-15 | 1978-08-01 | 23 | Details |
| US4104090A | Total dielectric isolation utilizing a combination of react… | Expired / Lapsed | 1977-02-24 | 1978-08-01 | 13 | Details |
| US4103314A | Motion control system | Expired / Lapsed | 1977-06-14 | 1978-07-25 | 16 | Details |
| US4100597A | Computer controlled distribution apparatus for distributing… | Expired / Lapsed | 1976-04-02 | 1978-07-11 | 8 | Details |
| US4097802A | Magnetoresistive field sensor with a magnetic shield which … | Expired / Lapsed | 1975-06-30 | 1978-06-27 | 24 | Details |
| US4096355A | Common channel access method for a plurality of data statio… | Expired / Lapsed | 1977-10-13 | 1978-06-20 | 10 | Details |
| US4096566A | Modular signal processor having a hierarchical structure | Expired / Lapsed | 1975-12-16 | 1978-06-20 | 9 | Details |
| US4093983A | Fast and normal rate instruction fetching | Expired / Lapsed | 1976-06-15 | 1978-06-06 | 17 | Details |
| US4093982A | Microprocessor system | Expired / Lapsed | 1976-05-03 | 1978-06-06 | 16 | Details |
| US4092061A | Side-coupling of light for an optical fiber | Expired / Lapsed | 1976-12-29 | 1978-05-30 | 5 | Details |
| US4092697A | Heat transfer mechanism for integrated circuit package | Expired / Lapsed | 1976-12-06 | 1978-05-30 | 8 | Details |
| US4092637A | Liquid electrolyte type electrochromic display device | Expired / Lapsed | 1976-05-05 | 1978-05-30 | 13 | Details |
| US4089516A | Multibin, cut-sheet xerographic copier | Expired / Lapsed | 1977-04-18 | 1978-05-16 | 55 | Details |
| US4088833A | Carrier detector | Expired / Lapsed | 1976-11-10 | 1978-05-09 | 12 | Details |
| US4088991A | Visual display by electric control of scattering of light f… | Expired / Lapsed | 1976-06-30 | 1978-05-09 | 21 | Details |
| US4087569A | Prebaking treatment for resist mask composition and mask ma… | Expired / Lapsed | 1976-12-20 | 1978-05-02 | 8 | Details |
| US4086660A | Automatic format control for text printing system | Expired / Lapsed | 1976-04-27 | 1978-04-25 | 4 | Details |
| US4085448A | Data communication bus structure | Expired / Lapsed | 1976-10-04 | 1978-04-18 | 4 | Details |
| US4084231A | System for facilitating the copying back of data in disc an… | Expired / Lapsed | 1975-12-18 | 1978-04-11 | 6 | Details |
| US4078098A | High energy radiation exposed positive resist mask process | Expired / Lapsed | 1974-05-28 | 1978-03-07 | 4 | Details |
| US4078254A | Hierarchical memory with dedicated high speed buffers | Expired / Lapsed | 1973-12-26 | 1978-03-07 | 15 | Details |
| US4075693A | Configuration and control unit for a heterogeneous multi-sy… | Expired / Lapsed | 1976-12-15 | 1978-02-21 | 13 | Details |
| US4074254A | Xy addressable and updateable compressed video refresh buff… | Expired / Lapsed | 1976-07-22 | 1978-02-14 | 6 | Details |
| US4074237A | Word line clamping circuit and decoder | Expired / Lapsed | 1976-03-08 | 1978-02-14 | 8 | Details |
| US4072888A | Method of controlling a stepper motor | Expired / Lapsed | 1975-04-28 | 1978-02-07 | 18 | Details |
| US4071903A | Autocorrelation function factor generating method and circu… | Expired / Lapsed | 1976-08-04 | 1978-01-31 | 11 | Details |
| US4070501A | Forming self-aligned via holes in thin film interconnection… | Expired / Lapsed | 1976-10-28 | 1978-01-24 | 16 | Details |
| US4070116A | Gap measuring device for defining the distance between two … | Expired / Lapsed | 1976-06-11 | 1978-01-24 | 11 | Details |
| US4068839A | Sheet stacking apparatus | Expired / Lapsed | 1977-03-04 | 1978-01-17 | 17 | Details |
| US4069486A | Single array ink jet printer | Expired / Lapsed | 1976-06-28 | 1978-01-17 | 8 | Details |
| US4069488A | Computer controlled distribution apparatus for distributing… | Expired / Lapsed | 1976-04-02 | 1978-01-17 | 26 | Details |
| US4068224A | Compressed information storage for characters consisting of… | Expired / Lapsed | 1975-11-17 | 1978-01-10 | 6 | Details |
| US4066491A | Method of simultaneously etching multiple tapered viaducts … | Expired / Lapsed | 1977-03-28 | 1978-01-03 | 10 | Details |
| US4067019A | Impact position transducer for ink jet | Expired / Lapsed | 1976-06-14 | 1978-01-03 | 14 | Details |
| US4063223A | Nondestructive cursors in AC plasma displays | Expired / Lapsed | 1976-08-11 | 1977-12-13 | 25 | Details |
| US4063082A | Device generating a digital filter and a discrete convoluti… | Expired / Lapsed | 1976-03-10 | 1977-12-13 | 7 | Details |
| US4063308A | Automatic clock tuning and measuring system for LSI compute… | Expired / Lapsed | 1975-06-27 | 1977-12-13 | 14 | Details |
| US4059323A | Apparatus for interconnecting plural mating members | Expired / Lapsed | 1976-05-13 | 1977-11-22 | 11 | Details |
| US4053873A | Self-isolating cross-coupled sense amplifier latch circuit | Expired / Lapsed | 1976-06-30 | 1977-10-11 | 51 | Details |
| US4053948A | Look aside array invalidation mechanism | Expired / Lapsed | 1976-06-21 | 1977-10-11 | 4 | Details |
| US4053944A | Microprocessor controlled signal pattern detector | Expired / Lapsed | 1976-04-30 | 1977-10-11 | 8 | Details |
| US4053950A | Residual status reporting during chained cycle steal input/… | Expired / Lapsed | 1976-04-30 | 1977-10-11 | 5 | Details |
| US4053925A | Method and structure for controllng carrier lifetime in sem… | Expired / Lapsed | 1975-08-07 | 1977-10-11 | 16 | Details |
| US4050507A | Method for customizing nucleate boiling heat transfer from … | Expired / Lapsed | 1975-06-27 | 1977-09-27 | 12 | Details |
| US4050060A | Equate operand address space control system | Expired / Lapsed | 1976-04-30 | 1977-09-20 | 7 | Details |
| US4049522A | Low coercivity iron-silicon material, shields, and process | Expired / Lapsed | 1976-02-26 | 1977-09-20 | 5 | Details |
| US4048671A | Address match for data processing system with virtual addre… | Expired / Lapsed | 1976-06-30 | 1977-09-13 | 7 | Details |
| US4047607A | Articulated ribbon-guiding structure | Expired / Lapsed | 1976-04-01 | 1977-09-13 | 45 | Details |
| US4047244A | Microprogrammed data processing system | Expired / Lapsed | 1976-05-19 | 1977-09-06 | 14 | Details |
| US4047184A | Charge electrode array and combination for ink jet printing… | Expired / Lapsed | 1976-01-28 | 1977-09-06 | 37 | Details |
| US4046471A | Dual mode electrophotographic apparatus having dual functio… | Expired / Lapsed | 1975-11-03 | 1977-09-06 | 12 | Details |
| US4044452A | Process for making field effect and bipolar transistors on … | Expired / Lapsed | 1976-10-06 | 1977-08-30 | 8 | Details |
| US4044454A | Method for forming integrated circuit regions defined by re… | Expired / Lapsed | 1975-04-16 | 1977-08-30 | 7 | Details |
| US4044244A | Automatic tester for complex semiconductor components inclu… | Expired / Lapsed | 1976-08-06 | 1977-08-23 | 17 | Details |
| US4044232A | Electronic copy selection controls for a document reproduct… | Expired / Lapsed | 1976-01-23 | 1977-08-23 | 44 | Details |
| US4044392A | Process for making a read-while-write tape head and the pro… | Expired / Lapsed | 1975-08-14 | 1977-08-23 | 12 | Details |
| US4042777A | One-handed keyboard and its control means | Expired / Lapsed | 1976-11-15 | 1977-08-16 | 33 | Details |
| US4042913A | Address key register load/store instruction system | Expired / Lapsed | 1976-04-30 | 1977-08-16 | 6 | Details |
| US4040895A | Control of oxygen in silicon crystals | Expired / Lapsed | 1975-10-22 | 1977-08-09 | 5 | Details |
| US4041461A | Signal analyzer system | Expired / Lapsed | 1975-07-25 | 1977-08-09 | 43 | Details |
| US4038439A | Method for producing selected alignment in liquid crystal | Expired / Lapsed | 1976-09-20 | 1977-07-26 | 17 | Details |
| US4038642A | Input/output interface logic for concurrent operations | Expired / Lapsed | 1976-04-30 | 1977-07-26 | 13 | Details |
| US4038693A | Anti-static magnetic record disk assembly | Expired / Lapsed | 1975-09-23 | 1977-07-26 | 6 | Details |
| US4036723A | RF bias sputtering method for producing insulating films fr… | Expired / Lapsed | 1976-06-01 | 1977-07-19 | 25 | Details |
| US4037215A | Key controlled address relocation translation system | Expired / Lapsed | 1976-04-30 | 1977-07-19 | 5 | Details |
| US4037207A | System for controlling address keys under interrupt conditi… | Expired / Lapsed | 1976-04-30 | 1977-07-19 | 11 | Details |
| US4035778A | Apparatus for assigning space in a working memory as a func… | Expired / Lapsed | 1975-11-17 | 1977-07-12 | 6 | Details |
| US4032899A | Apparatus and method for switching of data | Expired / Lapsed | 1976-01-19 | 1977-06-28 | 14 | Details |
| US4032982A | Adaptive voltage control of motor in an incrementing magnet… | Expired / Lapsed | 1975-08-29 | 1977-06-28 | 19 | Details |
| US4032719A | Modular slot interchange digital exchange | Expired / Lapsed | 1975-06-26 | 1977-06-28 | 18 | Details |
| US4030591A | Controls for a movable disk printer | Expired / Lapsed | 1975-09-25 | 1977-06-21 | 4 | Details |
| US4029522A | Method to fabricate ion-implanted layers with abrupt edges … | Expired / Lapsed | 1976-06-30 | 1977-06-14 | 28 | Details |
| US4029977A | Rotary stepper motor and method of operation | Expired / Lapsed | 1975-11-26 | 1977-06-14 | 11 | Details |
| US4029419A | Textile color analyzer calibration | Expired / Lapsed | 1975-10-10 | 1977-06-14 | 9 | Details |
| US4028493A | Call progress signal detector | Expired / Lapsed | 1975-12-22 | 1977-06-07 | 13 | Details |
| US4027137A | Laser drilling nozzle | Expired / Lapsed | 1975-09-17 | 1977-05-31 | 7 | Details |
| US4023148A | Write speed-up circuit for integrated data memories | Expired / Lapsed | 1975-11-26 | 1977-05-10 | 13 | Details |
| US4022927A | Methods for forming thick self-supporting masks | Expired / Lapsed | 1975-06-30 | 1977-05-10 | 46 | Details |
| US4021655A | Oversized data detection hardware for data processors which… | Expired / Lapsed | 1976-03-30 | 1977-05-03 | 22 | Details |
| US4021838A | Semiconductor integrated circuit devices | Expired / Lapsed | 1975-10-20 | 1977-05-03 | 13 | Details |
| US4019616A | Linear motion drive apparatus for a printer carriage | Expired / Lapsed | 1976-06-24 | 1977-04-26 | 2 | Details |
| US4020462A | Method and apparatus for form removal from contour compress… | Expired / Lapsed | 1975-12-08 | 1977-04-26 | 12 | Details |
| US4020460A | Method and apparatus of checking to determine if a signal i… | Expired / Lapsed | 1975-11-13 | 1977-04-26 | 6 | Details |
| US4020466A | Memory hierarchy system with journaling and copy back | Expired / Lapsed | 1974-07-05 | 1977-04-26 | 8 | Details |
| US4017883A | Single-electrode charge-coupled random access memory cell w… | Expired / Lapsed | 1973-09-24 | 1977-04-12 | 6 | Details |
| US4016062A | Method of forming a serrated surface topography | Expired / Lapsed | 1975-09-11 | 1977-04-05 | 11 | Details |
| US4016603A | Disk storage apparatus having signals recorded in a specifi… | Expired / Lapsed | 1975-05-30 | 1977-04-05 | 40 | Details |
| US4015147A | Low power transmission line terminator | Expired / Lapsed | 1975-09-08 | 1977-03-29 | 6 | Details |
| US4014005A | Configuration and control unit for a heterogeneous multi-sy… | Expired / Lapsed | 1976-01-05 | 1977-03-22 | 9 | Details |
| US4011591A | Internal division actuation of ventilated floppy disk stack | Expired / Lapsed | 1975-11-04 | 1977-03-08 | 22 | Details |
| US4009347A | Modular branch exchange and nodal access units for multiple… | Expired / Lapsed | 1974-12-30 | 1977-02-22 | 14 | Details |
| US4008460A | Circuit for implementing a modified LRU replacement algorit… | Expired / Lapsed | 1975-12-24 | 1977-02-15 | 18 | Details |
| US4007450A | Data sharing computer network | Expired / Lapsed | 1975-06-30 | 1977-02-08 | 16 | Details |
| US4007464A | Ink jet nozzle | Expired / Lapsed | 1975-01-23 | 1977-02-08 | 24 | Details |
| US4007442A | Intermixed line heights and blank line formation in a buffe… | Expired / Lapsed | 1974-11-11 | 1977-02-08 | 22 | Details |
| US4006492A | High density semiconductor chip organization | Expired / Lapsed | 1975-06-23 | 1977-02-01 | 27 | Details |
| US4005411A | Compression of gray scale imagery to less than one bit per … | Expired / Lapsed | 1974-12-30 | 1977-01-25 | 9 | Details |
| US4005390A | Merger and multiple translate tables in a buffered printer | Expired / Lapsed | 1974-11-11 | 1977-01-25 | 24 | Details |
| US4004044A | Method for forming patterned films utilizing a transparent … | Expired / Lapsed | 1975-05-09 | 1977-01-18 | 9 | Details |
| US4004170A | MOSFET latching driver | Expired / Lapsed | 1975-04-29 | 1977-01-18 | 4 | Details |
| US4001601A | Two bit partitioning circuit for a dynamic, programmed logi… | Expired / Lapsed | 1975-09-25 | 1977-01-04 | 12 | Details |
| US3999168A | Intermixed pitches in a buffered printer | Expired / Lapsed | 1974-11-11 | 1976-12-21 | 20 | Details |
| US3995172A | Enhancement-and depletion-type field effect transistors con… | Expired / Lapsed | 1975-06-05 | 1976-11-30 | 12 | Details |
| US3994793A | Reactive ion etching of aluminum | Expired / Lapsed | 1975-05-22 | 1976-11-30 | 10 | Details |
| US3993917A | Parameter independent FET sense amplifier | Expired / Lapsed | 1975-05-29 | 1976-11-23 | 31 | Details |
| US3989210A | Cable clamp and strain relief device | Expired / Lapsed | 1974-08-05 | 1976-11-02 | 4 | Details |
| US3988545A | Method of transmitting information and multiplexing device … | Expired / Lapsed | 1975-04-23 | 1976-10-26 | 11 | Details |
| US3988617A | Field effect transistor bias circuit | Expired / Lapsed | 1974-12-23 | 1976-10-26 | 10 | Details |
| US3987374A | Multi-line, multi-mode modulator using bandwidth reduction … | Expired / Lapsed | 1975-11-10 | 1976-10-19 | 10 | Details |
| US3987137A | Method of making a direct inking platen | Expired / Lapsed | 1975-02-27 | 1976-10-19 | 2 | Details |
| US3986054A | High voltage integrated driver circuit | Expired / Lapsed | 1975-01-27 | 1976-10-12 | 6 | Details |
| US3984833A | Apparatus for encoding extended run-length codes | Expired / Lapsed | 1975-07-17 | 1976-10-05 | 5 | Details |
| US3984582A | Method for preparing positive resist image | Expired / Lapsed | 1975-06-30 | 1976-10-05 | 30 | Details |
| US3983402A | Ion implantation apparatus | Expired / Lapsed | 1975-12-22 | 1976-09-28 | 12 | Details |
| US3983544A | Split memory array sharing same sensing and bit decode circ… | Expired / Lapsed | 1975-08-25 | 1976-09-28 | 9 | Details |
| US3983389A | Wand for reading optically encoded graphic symbols | Expired / Lapsed | 1975-04-11 | 1976-09-28 | 12 | Details |
| US3983535A | Signature verification method and apparatus | Expired / Lapsed | 1975-03-04 | 1976-09-28 | 34 | Details |
| US3983022A | Process for planarizing a surface | Expired / Lapsed | 1974-10-07 | 1976-09-28 | 6 | Details |
| US3982231A | Prefixing in a multiprocessing system | Expired / Lapsed | 1974-04-16 | 1976-09-21 | 8 | Details |
| US3980809A | Encoding logic for reduced bandwidth pictorial data transmi… | Expired / Lapsed | 1975-03-06 | 1976-09-14 | 10 | Details |
| USRE28958E | Synchronous disconnection and rearrangement | Expired / Lapsed | 1975-10-06 | 1976-09-07 | 6 | Details |
| US3979651A | Direct current and synchronous motor system | Expired / Lapsed | 1974-12-23 | 1976-09-07 | 15 | Details |
| US3978472A | Digital volt-ohmmeter | Expired / Lapsed | 1975-04-30 | 1976-08-31 | 8 | Details |
| US3976982A | Apparatus for image manipulation | Expired / Lapsed | 1975-05-12 | 1976-08-24 | 9 | Details |
| US3976992A | Gas display panel with light pen | Expired / Lapsed | 1975-01-03 | 1976-08-24 | 8 | Details |
| US3975772A | Double shielded magnetorestive sensing element | Expired / Lapsed | 1975-06-02 | 1976-08-17 | 16 | Details |
| US3975769A | Storage device utilizing flexible magnetic disks | Expired / Lapsed | 1975-02-07 | 1976-08-17 | 6 | Details |
| US3974486A | Multiplication mode bistable field effect transistor and me… | Expired / Lapsed | 1975-04-07 | 1976-08-10 | 23 | Details |
| US3972754A | Method for forming dielectric isolation in integrated circu… | Expired / Lapsed | 1975-05-30 | 1976-08-03 | 7 | Details |
| US3973245A | Method and apparatus for point plotting of graphical data f… | Expired / Lapsed | 1974-06-10 | 1976-08-03 | 10 | Details |
| US3972000A | Phase filter for reducing the effects of the noise componen… | Expired / Lapsed | 1975-07-15 | 1976-07-27 | 13 | Details |
| US3972023A | I/O data transfer control system | Expired / Lapsed | 1974-12-30 | 1976-07-27 | 83 | Details |
| US3969733A | Sub-harmonic phase control for an ink jet recording system | Expired / Lapsed | 1974-12-16 | 1976-07-13 | 13 | Details |
| US3966514A | Method for forming dielectric isolation combining dielectri… | Expired / Lapsed | 1975-06-30 | 1976-06-29 | 7 | Details |
| US3964054A | Hierarchy response priority adjustment mechanism | Expired / Lapsed | 1975-06-23 | 1976-06-15 | 9 | Details |
| US3963986A | Programmable interface contactor structure | Expired / Lapsed | 1975-02-10 | 1976-06-15 | 13 | Details |
| US3963841A | Catalytic surface preparation for electroless plating | Expired / Lapsed | 1975-01-06 | 1976-06-15 | 15 | Details |
| US3961139A | Time division multiplexed loop communication system with dy… | Expired / Lapsed | 1975-05-14 | 1976-06-01 | 20 | Details |
| US3961254A | Testing embedded arrays | Expired / Lapsed | 1974-12-20 | 1976-06-01 | 9 | Details |
| US3961312A | Cycle interleaving during burst mode operation | Expired / Lapsed | 1974-07-15 | 1976-06-01 | 15 | Details |
| US3961372A | Magnetic tape transport with slotted rotating head | Expired / Lapsed | 1974-07-05 | 1976-06-01 | 10 | Details |
| US3959799A | Information storage by laser beam initiated reactions | Expired / Lapsed | 1974-09-09 | 1976-05-25 | 2 | Details |
| US3958228A | Fault tolerant least recently used algorithm logic | Expired / Lapsed | 1975-03-20 | 1976-05-18 | 6 | Details |
| US3958255A | Ink jet nozzle structure | Expired / Lapsed | 1974-12-31 | 1976-05-18 | 9 | Details |
| US3958191A | Multi-line, multi-mode modulator using bandwidth reduction … | Expired / Lapsed | 1974-11-21 | 1976-05-18 | 24 | Details |
| US3955269A | Fabricating high performance integrated bipolar and complem… | Expired / Lapsed | 1975-06-19 | 1976-05-11 | 25 | Details |
| US3956766A | Counter resetting circuitry for magnetic disk system | Expired / Lapsed | 1974-11-25 | 1976-05-11 | 6 | Details |
| US3956527A | Dielectrically isolated Schottky Barrier structure and meth… | Expired / Lapsed | 1974-10-03 | 1976-05-11 | 8 | Details |
| US3954523A | Process for fabricating devices having dielectric isolation… | Expired / Lapsed | 1975-04-14 | 1976-05-04 | 11 | Details |
| US3953839A | Bit circuitry for enhance-deplete ram | Expired / Lapsed | 1975-04-10 | 1976-04-27 | 15 | Details |
| US3950682A | Digital dc motor velocity control system | Expired / Lapsed | 1974-12-19 | 1976-04-13 | 13 | Details |
| US3949385A | D.C. Stable semiconductor memory cell | Expired / Lapsed | 1974-12-23 | 1976-04-06 | 20 | Details |
| US3949383A | D. C. Stable semiconductor memory cell | Expired / Lapsed | 1974-12-23 | 1976-04-06 | 8 | Details |
| US3949387A | Beam addressable film using amorphous magnetic material | Expired / Lapsed | 1972-08-29 | 1976-04-06 | 45 | Details |
| US3946439A | Recording apparatus for magnetic disks using both sides of … | Expired / Lapsed | 1975-01-31 | 1976-03-23 | 15 | Details |
| US3939438A | Phase locked oscillator | Expired / Lapsed | 1975-01-23 | 1976-02-17 | 13 | Details |
| US3938101A | Computer system with post execution I/O emulation | Expired / Lapsed | 1973-12-26 | 1976-02-10 | 20 | Details |
| US3932847A | Time-of-day clock synchronization among multiple processing… | Expired / Lapsed | 1973-11-06 | 1976-01-13 | 7 | Details |
| US3930870A | Silicon polishing solution preparation | Expired / Lapsed | 1973-12-28 | 1976-01-06 | 18 | Details |
| US3928830A | Diagnostic system for field replaceable units | Expired / Lapsed | 1974-09-19 | 1975-12-23 | 9 | Details |
| US3924268A | High density track follower control system for magnetic dis… | Expired / Lapsed | 1974-08-05 | 1975-12-02 | 23 | Details |
| US3921137A | Semi static time division multiplex slot assignment | Expired / Lapsed | 1974-06-25 | 1975-11-18 | 14 | Details |
| US3919060A | Method of fabricating semiconductor device embodying dielec… | Expired / Lapsed | 1974-06-14 | 1975-11-11 | 18 | Details |
| US3919483A | Parallel multiplexed loop interface for data transfer and c… | Expired / Lapsed | 1973-12-26 | 1975-11-11 | 14 | Details |
| US3918049A | Thresholder for analog signals | Expired / Lapsed | 1974-08-05 | 1975-11-04 | 11 | Details |
| US3917384A | High resolution lenses for optical waveguides | Expired / Lapsed | 1973-09-11 | 1975-11-04 | 4 | Details |
| US3916390A | Dynamic memory with non-volatile back-up mode | Expired / Lapsed | 1974-12-31 | 1975-10-28 | 15 | Details |
| US3916388A | Shifting apparatus for automatic data alignment | Expired / Lapsed | 1974-05-30 | 1975-10-28 | 24 | Details |
| US3913021A | High resolution digitally programmable electronic delay for… | Expired / Lapsed | 1974-04-29 | 1975-10-14 | 29 | Details |
| US3911363A | Delta modulation circuitry with automatic squelch and gain … | Expired / Lapsed | 1974-12-09 | 1975-10-07 | 15 | Details |
| US3911424A | Alphanumeric character display scheme for programmable elec… | Expired / Lapsed | 1974-09-05 | 1975-10-07 | 11 | Details |
| US3911464A | Nonvolatile semiconductor memory | Expired / Lapsed | 1973-05-29 | 1975-10-07 | 15 | Details |
| US3908194A | Integrated magnetoresistive read, inductive write, batch fa… | Expired / Lapsed | 1974-08-19 | 1975-09-23 | 26 | Details |
| US3907429A | Method and device for detecting the velocity of droplets fo… | Expired / Lapsed | 1974-08-08 | 1975-09-23 | 16 | Details |
| US3906480A | Digital television display system employing coded vector gr… | Expired / Lapsed | 1973-02-23 | 1975-09-16 | 10 | Details |
| US3900162A | Method and apparatus for generation of multiple uniform flu… | Expired / Lapsed | 1974-01-10 | 1975-08-19 | 16 | Details |
| US3900192A | Sheet feeding apparatus | Expired / Lapsed | 1973-12-26 | 1975-08-19 | 16 | Details |
| US3900836A | Interleaved memory control signal handling apparatus using … | Expired / Lapsed | 1973-11-30 | 1975-08-19 | 5 | Details |
| US3899363A | Method and device for reducing sidewall conduction in reces… | Expired / Lapsed | 1974-06-28 | 1975-08-12 | 45 | Details |
| US3898630A | High voltage integrated driver circuit | Expired / Lapsed | 1973-10-11 | 1975-08-05 | 15 | Details |
| US3895357A | Buffer memory arrangement for a digital television display … | Expired / Lapsed | 1973-11-15 | 1975-07-15 | 8 | Details |
| CA971285A | Dynamic address translation reversed | Expired / Lapsed | 1972-06-22 | 1975-07-15 | 0 | Details |
| US3892925A | Electric signal exchange switching arrangement | Expired / Lapsed | 1974-06-03 | 1975-07-01 | 17 | Details |
| US3889243A | Stack mechanism for a data processor | Expired / Lapsed | 1973-10-18 | 1975-06-10 | 7 | Details |
| US3889169A | Position and velocity servo control for motor controlled ar… | Expired / Lapsed | 1973-10-11 | 1975-06-10 | 12 | Details |
| US3889188A | Time zero determination of FET reliability | Expired / Lapsed | 1973-07-30 | 1975-06-10 | 12 | Details |
| US3889241A | Shift register buffer apparatus | Expired / Lapsed | 1973-02-02 | 1975-06-10 | 15 | Details |
| US3887261A | Low-loss reflection coatings using absorbing materials | Expired / Lapsed | 1973-03-23 | 1975-06-03 | 2 | Details |
| US3886000A | Method for controlling dielectric isolation of a semiconduc… | Expired / Lapsed | 1973-11-05 | 1975-05-27 | 20 | Details |
| US3886525A | Shared data controlled by a plurality of users | Expired / Lapsed | 1973-06-29 | 1975-05-27 | 3 | Details |
| US3885872A | Digital proximity sensing system | Expired / Lapsed | 1973-06-12 | 1975-05-27 | 6 | Details |
| US3882532A | Externally accessing mechanically difficult to access circu… | Expired / Lapsed | 1973-12-26 | 1975-05-06 | 3 | Details |
| US3882326A | Differential amplifier for sensing small signals | Expired / Lapsed | 1973-12-26 | 1975-05-06 | 20 | Details |
| US3881605A | Object orienting device to assist robot manipulator | Expired / Lapsed | 1973-06-29 | 1975-05-06 | 7 | Details |
| US3882355A | Flat screen display device using controlled cold cathodes | Expired / Lapsed | 1972-12-29 | 1975-05-06 | 19 | Details |
| US3881184A | Adaptive digital servo system | Expired / Lapsed | 1974-05-28 | 1975-04-29 | 21 | Details |
| US3881191A | Three-gap magnetic recording head having a single flux sens… | Expired / Lapsed | 1972-05-19 | 1975-04-29 | 10 | Details |
| US3879621A | Sense amplifier | Expired / Lapsed | 1973-04-18 | 1975-04-22 | 21 | Details |
| US3877784A | Beam address optical storage head | Expired / Lapsed | 1973-09-20 | 1975-04-15 | 38 | Details |
| US3876983A | Synchronous disconnection and rearrangement | Expired / Lapsed | 1974-04-29 | 1975-04-08 | 6 | Details |
| US3873818A | Electronic tester for testing devices having a high circuit… | Expired / Lapsed | 1973-10-29 | 1975-03-25 | 62 | Details |
| US3873372A | Method for producing improved transistor devices | Expired / Lapsed | 1973-07-09 | 1975-03-25 | 49 | Details |
| US3869324A | Method of polishing cadmium telluride | Expired / Lapsed | 1973-12-28 | 1975-03-04 | 11 | Details |
| US3867676A | Variable reluctance linear stepper motor | Expired / Lapsed | 1973-09-20 | 1975-02-18 | 10 | Details |
| US3865654A | Complementary field effect transistor having p doped silico… | Expired / Lapsed | 1974-02-11 | 1975-02-11 | 11 | Details |
| US3866176A | Address selection circuit for storage arrays | Expired / Lapsed | 1974-01-31 | 1975-02-11 | 17 | Details |
| US3865652A | Method of forming self-aligned field effect transistor and … | Expired / Lapsed | 1973-10-05 | 1975-02-11 | 55 | Details |
| US3866237A | Digital phase control for ink jet printer | Expired / Lapsed | 1973-06-22 | 1975-02-11 | 15 | Details |
| US3864751A | Induced bias magnetoresistive read transducer | Expired / Lapsed | 1973-10-04 | 1975-02-04 | 12 | Details |
| US3859632A | Digital input scanner guidance system | Expired / Lapsed | 1972-12-26 | 1975-01-07 | 4 | Details |
| US3858060A | Integrated driver circuit | Expired / Lapsed | 1973-06-07 | 1974-12-31 | 6 | Details |
| US3852120A | Method for manufacturing ion implanted insulated gate field… | Expired / Lapsed | 1973-05-29 | 1974-12-03 | 8 | Details |
| US3849712A | Adaptive numerically controlled machine tool responsive to … | Expired / Lapsed | 1972-06-30 | 1974-11-19 | 4 | Details |
| US3848252A | Magnetic keyboard | Expired / Lapsed | 1972-02-24 | 1974-11-12 | 4 | Details |
| US3846836A | Loading and unloading mechanism for flexible magnetic disks | Expired / Lapsed | 1973-08-30 | 1974-11-05 | 15 | Details |
| US3846768A | Fixed threshold variable threshold storage device for use i… | Expired / Lapsed | 1972-12-29 | 1974-11-05 | 29 | Details |
| US3845378A | Analog stepping motor control system | Expired / Lapsed | 1972-12-27 | 1974-10-29 | 7 | Details |
| US3841926A | Integrated circuit fabrication process | Expired / Lapsed | 1973-01-02 | 1974-10-15 | 17 | Details |
| US3842331A | Digital stepping motor control system | Expired / Lapsed | 1972-12-27 | 1974-10-15 | 26 | Details |
| US3842405A | Communications control unit | Expired / Lapsed | 1972-02-15 | 1974-10-15 | 11 | Details |
| US3840863A | Dynamic storage hierarchy system | Expired / Lapsed | 1973-10-23 | 1974-10-08 | 9 | Details |
| US3840894A | Wide rotor for stable support of tape along path of transdu… | Expired / Lapsed | 1973-04-02 | 1974-10-08 | 12 | Details |
| US3840898A | Self-biased magnetoresistive sensor | Expired / Lapsed | 1972-12-29 | 1974-10-08 | 21 | Details |
| US3840809A | Non-destructive measurement of dielectric properties | Expired / Lapsed | 1972-12-04 | 1974-10-08 | 19 | Details |
| US3840409A | Insulating layer pedestal transistor device and process | Expired / Lapsed | 1972-05-08 | 1974-10-08 | 8 | Details |
| US3836992A | Electrically erasable floating gate fet memory cell | Expired / Lapsed | 1973-03-16 | 1974-09-17 | 8 | Details |
| US3836896A | Non-volatile magnetic domain device having binary valued bi… | Expired / Lapsed | 1972-06-29 | 1974-09-17 | 9 | Details |
| US3836892A | D.c. stable electronic storage utilizing a.c. stable storag… | Expired / Lapsed | 1972-06-29 | 1974-09-17 | 11 | Details |
| US3833900A | Image compaction system | Expired / Lapsed | 1972-08-18 | 1974-09-03 | 7 | Details |
| US3831007A | Non-reproducible document | Expired / Lapsed | 1973-03-21 | 1974-08-20 | 7 | Details |
| US3830972A | Sensitivity compensation for a self scanned photodiode array | Expired / Lapsed | 1972-11-13 | 1974-08-20 | 10 | Details |
| US3830352A | Articulated typewriter frame | Expired / Lapsed | 1972-10-02 | 1974-08-20 | 9 | Details |
| US3831076A | Sector scanning control system | Expired / Lapsed | 1972-03-17 | 1974-08-20 | 11 | Details |
| US3829896A | Bias means for batch fabricated magnetic head and method of… | Expired / Lapsed | 1972-11-08 | 1974-08-13 | 24 | Details |
| US3828327A | Simplified storage protection and address translation under… | Expired / Lapsed | 1973-04-30 | 1974-08-06 | 23 | Details |
| US3825893A | Modular distributed error detection and correction apparatu… | Expired / Lapsed | 1973-05-29 | 1974-07-23 | 10 | Details |
| US3825903A | Automatic switching of storage protect keys | Expired / Lapsed | 1973-04-30 | 1974-07-23 | 10 | Details |
| US3825926A | Interfacing circuitry for connecting a remote keyboard with… | Expired / Lapsed | 1973-02-05 | 1974-07-23 | 4 | Details |
| US3825901A | Integrated diagnostic tool | Expired / Lapsed | 1972-11-09 | 1974-07-23 | 11 | Details |
| US3823416A | Flying magnetic transducer assembly having three rails | Expired / Lapsed | 1973-03-01 | 1974-07-09 | 12 | Details |
| US3821713A | Multiple station receiver controlled transmission loop inte… | Expired / Lapsed | 1972-12-29 | 1974-06-28 | 12 | Details |
| US3821494A | Digital echo suppressor with direct table look up control b… | Expired / Lapsed | 1972-07-14 | 1974-06-28 | 8 | Details |
| US3820087A | Three dimensional memory | Expired / Lapsed | 1972-12-29 | 1974-06-25 | 7 | Details |
| US3820086A | Read only memory(rom)superimposed on read/write memory(ram) | Expired / Lapsed | 1972-05-01 | 1974-06-25 | 24 | Details |
| US3818447A | Priority data handling system and method | Expired / Lapsed | 1973-03-16 | 1974-06-18 | 14 | Details |
| US3818201A | Method and system arrangement for monitoring and indicating… | Expired / Lapsed | 1972-11-16 | 1974-06-18 | 13 | Details |
| US3814917A | Signal processing device for weighting delta coded sequence… | Expired / Lapsed | 1973-05-29 | 1974-06-04 | 4 | Details |
| US3814863A | Internally biased magnetoresistive magnetic transducer | Expired / Lapsed | 1972-10-11 | 1974-06-04 | 29 | Details |
| US3815025A | Large-scale integrated circuit testing structure | Expired / Lapsed | 1971-10-18 | 1974-06-04 | 7 | Details |
| US3813513A | Thermal printing device | Expired / Lapsed | 1973-03-16 | 1974-05-28 | 18 | Details |
| US3813692A | Internally biased magnetoresistive magnetic transducer | Expired / Lapsed | 1972-10-11 | 1974-05-28 | 13 | Details |
| US3813485A | System for compression of digital data | Expired / Lapsed | 1972-01-05 | 1974-05-28 | 23 | Details |
| US3812413A | Drive circuit for inductive load | Expired / Lapsed | 1972-03-06 | 1974-05-21 | 6 | Details |
| US3811076A | Field effect transistor integrated circuit and memory | Expired / Lapsed | 1973-01-02 | 1974-05-14 | 7 | Details |
| US3811117A | Time ordered memory system and operation | Expired / Lapsed | 1972-10-19 | 1974-05-14 | 20 | Details |
| US3808468A | Bootstrap fet driven with on-chip power supply | Expired / Lapsed | 1972-12-29 | 1974-04-30 | 7 | Details |
| US3806885A | Polling mechanism for transferring control from one data pr… | Expired / Lapsed | 1972-12-29 | 1974-04-23 | 12 | Details |
| US3806888A | Hierarchial memory system | Expired / Lapsed | 1972-12-04 | 1974-04-23 | 17 | Details |
| US3803554A | Apparatus for addressing an electronic data storage | Expired / Lapsed | 1972-04-27 | 1974-04-09 | 4 | Details |
| US3801962A | Communication mechanism for data transfer and control betwe… | Expired / Lapsed | 1972-12-29 | 1974-04-02 | 8 | Details |
| US3800078A | Digitally compensated scanning system | Expired / Lapsed | 1972-12-18 | 1974-03-26 | 12 | Details |
| US3800291A | Data processing system memory relocation apparatus and meth… | Expired / Lapsed | 1972-09-21 | 1974-03-26 | 12 | Details |
| US3798613A | Controlling peripheral subsystems | Expired / Lapsed | 1971-10-27 | 1974-03-19 | 18 | Details |
| US3798360A | Step code ciphering system | Expired / Lapsed | 1971-06-30 | 1974-03-19 | 9 | Details |
| US3798359A | Block cipher cryptographic system | Expired / Lapsed | 1971-06-30 | 1974-03-19 | 15 | Details |
| US3798007A | Method and apparatus for producing large diameter monocryst… | Expired / Lapsed | 1969-12-05 | 1974-03-19 | 16 | Details |
| US3797000A | Non-volatile semiconductor storage device utilizing avalanc… | Expired / Lapsed | 1972-12-29 | 1974-03-12 | 12 | Details |
| US3796830A | Recirculating block cipher cryptographic system | Expired / Lapsed | 1971-11-02 | 1974-03-12 | 11 | Details |
| US3796613A | Method of forming dielectric isolation for high density ped… | Expired / Lapsed | 1971-06-18 | 1974-03-12 | 0 | Details |
| US3795828A | Monolithic decoder circuit | Expired / Lapsed | 1973-03-08 | 1974-03-05 | 21 | Details |
| US3795908A | Gas panel with multi-directional shifting arrangement | Expired / Lapsed | 1972-06-13 | 1974-03-05 | 12 | Details |
| US3793090A | Method for stabilizing fet devices having silicon gates and… | Expired / Lapsed | 1972-11-21 | 1974-02-19 | 10 | Details |
| US3791715A | System for coupling light from a fiber optic waveguide into… | Expired / Lapsed | 1972-12-11 | 1974-02-12 | 7 | Details |
| US3792268A | Document scanner having optical diffusion means | Expired / Lapsed | 1972-01-06 | 1974-02-12 | 15 | Details |
| US3791858A | Method of forming multi-layer circuit panels | Expired / Lapsed | 1971-12-13 | 1974-02-12 | 10 | Details |
| US3790407A | Recording media and method of making | Expired / Lapsed | 1970-12-28 | 1974-02-05 | 4 | Details |
| US3787834A | Liquid crystal display system | Expired / Lapsed | 1972-12-29 | 1974-01-22 | 15 | Details |
| US3787669A | Test pattern generator | Expired / Lapsed | 1972-06-30 | 1974-01-22 | 11 | Details |
| US3786497A | Matrix keyboard method and apparatus | Expired / Lapsed | 1972-07-31 | 1974-01-15 | 22 | Details |
| US3786430A | Data processing system including a small auxiliary processo… | Expired / Lapsed | 1971-11-15 | 1974-01-15 | 3 | Details |
| US3786427A | Dynamic address translation reversed | Expired / Lapsed | 1971-06-29 | 1974-01-15 | 4 | Details |
| US3784907A | Method of propagation delay testing a functional logic syst… | Expired / Lapsed | 1972-10-16 | 1974-01-08 | 10 | Details |
| US3783254A | Level sensitive logic system | Expired / Lapsed | 1972-10-16 | 1974-01-01 | 23 | Details |
| US3781845A | Centralized security system employing a magnetic checking d… | Expired / Lapsed | 1972-06-29 | 1973-12-25 | 9 | Details |
| US3781829A | Test pattern generator | Expired / Lapsed | 1972-06-16 | 1973-12-25 | 10 | Details |
| US3779803A | Infrared sensitive semiconductor device and method of manuf… | Expired / Lapsed | 1971-11-22 | 1973-12-18 | 3 | Details |
| US3777186A | Charge transfer logic device | Expired / Lapsed | 1972-07-03 | 1973-12-04 | 14 | Details |
| US3777222A | Modular touch sensitive indicating panels with touch and li… | Expired / Lapsed | 1972-05-12 | 1973-12-04 | 44 | Details |
| US3775201A | Method for polishing semiconductor gallium phosphide planar… | Expired / Lapsed | 1971-10-26 | 1973-11-27 | 7 | Details |
| US3774157A | Method of and arrangement for the distribution of timing pu… | Expired / Lapsed | 1971-11-26 | 1973-11-20 | 4 | Details |
| US3772654A | Method and apparatus for data form modification | Expired / Lapsed | 1971-12-30 | 1973-11-13 | 4 | Details |
| US3771144A | Clock for computer performance measurements | Expired / Lapsed | 1972-07-24 | 1973-11-06 | 8 | Details |
| US3771137A | Memory control in a multipurpose system utilizing a broadca… | Expired / Lapsed | 1971-09-10 | 1973-11-06 | 27 | Details |
| US3771136A | Control unit | Expired / Lapsed | 1971-04-29 | 1973-11-06 | 5 | Details |
| US3769632A | Digital phase control for an ink jet recording system | Expired / Lapsed | 1972-12-11 | 1973-10-30 | 13 | Details |
| US3769453A | Finite memory adaptive predictor | Expired / Lapsed | 1972-08-17 | 1973-10-30 | 8 | Details |
| US3769630A | Ink jet synchronization and failure detection system | Expired / Lapsed | 1972-06-27 | 1973-10-30 | 7 | Details |
| US3769624A | Fluid droplet printer | Expired / Lapsed | 1972-04-06 | 1973-10-30 | 39 | Details |
| US3768080A | Device for address translation | Expired / Lapsed | 1972-01-20 | 1973-10-23 | 9 | Details |
| US3766533A | Processor utilizing one holographic array and a plurality o… | Expired / Lapsed | 1972-05-30 | 1973-10-16 | 18 | Details |
| US3766524A | Dynamic time slicing control for microprogrammed controller | Expired / Lapsed | 1971-06-30 | 1973-10-16 | 12 | Details |
| US3764218A | Light beam edge detection | Expired / Lapsed | 1972-01-12 | 1973-10-09 | 37 | Details |
| US3764914A | High speed line equalizer | Expired / Lapsed | 1971-12-27 | 1973-10-09 | 14 | Details |
| US3764742A | Cryptographic identification system | Expired / Lapsed | 1971-12-23 | 1973-10-09 | 13 | Details |
| US3763470A | Circuit arrangement for error detection in data processing … | Expired / Lapsed | 1972-01-20 | 1973-10-02 | 11 | Details |
| US3761897A | Gas cell memory system with electrical readout | Expired / Lapsed | 1972-06-23 | 1973-09-25 | 45 | Details |
| US3761883A | Storage protect key array for a multiprocessing system | Expired / Lapsed | 1972-01-20 | 1973-09-25 | 4 | Details |
| US3761942A | Low energy thermochromic image recording device | Expired / Lapsed | 1971-07-28 | 1973-09-25 | 2 | Details |
| US3761881A | Translation storage scheme for virtual memory system | Expired / Lapsed | 1971-06-30 | 1973-09-25 | 3 | Details |
| US3760369A | Distributed microprogram control in an information handling… | Expired / Lapsed | 1972-06-02 | 1973-09-18 | 10 | Details |
| US3760365A | Multiprocessing computing system with task assignment at th… | Expired / Lapsed | 1971-12-30 | 1973-09-18 | 18 | Details |
| US3760403A | Able strokes gas panel display having monogram type charact… | Expired / Lapsed | 1971-09-29 | 1973-09-18 | 12 | Details |
| US3760376A | System for controlling output lines with limited storage ca… | Expired / Lapsed | 1970-12-28 | 1973-09-18 | 5 | Details |
| US3757313A | Data storage with predetermined settable configuration | Expired / Lapsed | 1972-06-29 | 1973-09-04 | 8 | Details |
| US3757271A | Integrated circuit package | Expired / Lapsed | 1971-10-04 | 1973-09-04 | 6 | Details |
| US3757334A | Stabilized communication and control system | Expired / Lapsed | 1968-02-29 | 1973-09-04 | 21 | Details |
| US3755786A | Serial loop data transmission system | Expired / Lapsed | 1972-04-27 | 1973-08-28 | 8 | Details |
| US3755793A | Latent image memory with single-device cells of two types | Expired / Lapsed | 1972-04-13 | 1973-08-28 | 35 | Details |
| US3755784A | System for revision line retrieval | Expired / Lapsed | 1972-02-01 | 1973-08-28 | 13 | Details |
| US3754211A | Fast error recovery communication controller | Expired / Lapsed | 1971-12-30 | 1973-08-21 | 7 | Details |
| US3753157A | Leaky wave couplers for guided elastic wave and guided opti… | Expired / Lapsed | 1971-06-30 | 1973-08-14 | 15 | Details |
| US3750191A | Synchronization of multiple ink jets | Expired / Lapsed | 1972-09-25 | 1973-07-31 | 6 | Details |
| US3750189A | Light scanning and printing system | Expired / Lapsed | 1971-10-18 | 1973-07-31 | 22 | Details |
| US3748647A | Toroidal interconnection system | Expired / Lapsed | 1971-06-30 | 1973-07-24 | 12 | Details |
| US3746973A | Testing of metallization networks on insulative substrates … | Expired / Lapsed | 1972-05-05 | 1973-07-17 | 8 | Details |
| US3744899A | Method of preparing documents | Expired / Lapsed | 1970-06-11 | 1973-07-10 | 5 | Details |
| US3744033A | Text formatting for display | Expired / Lapsed | 1972-01-21 | 1973-07-03 | 6 | Details |
| US3740730A | Latchable decoder driver and memory array | Expired / Lapsed | 1971-06-30 | 1973-06-19 | 11 | Details |
| US3740723A | Integral hierarchical binary storage element | Expired / Lapsed | 1970-12-28 | 1973-06-19 | 4 | Details |
| US3737636A | Narrow band digital filter | Expired / Lapsed | 1972-05-03 | 1973-06-05 | 5 | Details |
| US3737870A | Status switching arrangement | Expired / Lapsed | 1972-04-24 | 1973-06-05 | 11 | Details |
| US3737637A | Data generator | Expired / Lapsed | 1971-12-13 | 1973-06-05 | 20 | Details |
| US3737282A | Method for reducing crystallographic defects in semiconduct… | Expired / Lapsed | 1971-10-01 | 1973-06-05 | 8 | Details |
| US3737855A | Character video enhancement system | Expired / Lapsed | 1971-09-30 | 1973-06-05 | 15 | Details |
| US3737751A | Servomechanism stop control | Expired / Lapsed | 1971-06-24 | 1973-06-05 | 17 | Details |
| US3736574A | Pseudo-hierarchy memory system | Expired / Lapsed | 1971-12-30 | 1973-05-29 | 27 | Details |
| US3736045A | Fast optical guided wave modulator and digital deflector | Expired / Lapsed | 1971-12-27 | 1973-05-29 | 8 | Details |
| US3736055A | Reproduction apparatus incorporating alternate redevelopmen… | Expired / Lapsed | 1971-12-17 | 1973-05-29 | 10 | Details |
| US3736569A | System for controlling power consumption in a computer | Expired / Lapsed | 1971-10-13 | 1973-05-29 | 8 | Details |
| US3736566A | Central processing unit with hardware controlled checkpoint… | Expired / Lapsed | 1971-08-18 | 1973-05-29 | 8 | Details |
| US3736414A | Transversal filter equalizer for partial response channels | Expired / Lapsed | 1971-06-30 | 1973-05-29 | 12 | Details |
| US3736044A | Dispersive acoustical deflector for electromagnetic waves | Expired / Lapsed | 1971-06-30 | 1973-05-29 | 28 | Details |
| US3736477A | Monolithic semiconductor circuit for a logic circuit concep… | Expired / Lapsed | 1971-04-14 | 1973-05-29 | 19 | Details |
| US3735357A | Priority system for a communication control unit | Expired / Lapsed | 1972-09-19 | 1973-05-22 | 6 | Details |
| US3735142A | Manually operated bar coding scanning system | Expired / Lapsed | 1972-02-04 | 1973-05-22 | 13 | Details |
| US3735362A | Shift register interconnection system | Expired / Lapsed | 1971-09-22 | 1973-05-22 | 12 | Details |
| US3735360A | High speed buffer operation in a multi-processing system | Expired / Lapsed | 1971-08-25 | 1973-05-22 | 10 | Details |
| US3734620A | Multiple band atomic absorption apparatus for simultaneousl… | Expired / Lapsed | 1971-04-01 | 1973-05-22 | 17 | Details |
| US3732543A | Loop switching teleprocessing method and system using switc… | Expired / Lapsed | 1971-06-30 | 1973-05-08 | 5 | Details |
| US3732480A | Open loop stepping motor acceleration-deceleration control | Expired / Lapsed | 1971-03-01 | 1973-05-08 | 21 | Details |
| US3732374A | Communication system and method | Expired / Lapsed | 1970-12-31 | 1973-05-08 | 34 | Details |
| US3731177A | Disc file head movement control system | Expired / Lapsed | 1971-12-15 | 1973-05-01 | 30 | Details |
| US3729713A | Data processing peripheral subsystems | Expired / Lapsed | 1971-08-04 | 1973-04-24 | 31 | Details |
| US3729714A | Proportional space character display including uniform char… | Expired / Lapsed | 1971-06-23 | 1973-04-24 | 5 | Details |
| US3727173A | Zero-insertion force connector | Expired / Lapsed | 1971-12-06 | 1973-04-10 | 10 | Details |
| US3727005A | Delta modulation system with randomly timed multiplexing ca… | Expired / Lapsed | 1971-06-30 | 1973-04-10 | 16 | Details |
| US3725787A | Exigent multisatellite digital radio communications system | Expired / Lapsed | 1971-06-30 | 1973-04-03 | 23 | Details |
| US3725864A | Input/output control | Expired / Lapsed | 1971-03-03 | 1973-04-03 | 72 | Details |
| US3725285A | Magnetic coating compositions | Expired / Lapsed | 1970-06-24 | 1973-04-03 | 0 | Details |
| US3723976A | Memory system with logical and real addressing | Expired / Lapsed | 1972-01-20 | 1973-03-27 | 13 | Details |
| US3723971A | Serial loop communications system | Expired / Lapsed | 1971-12-14 | 1973-03-27 | 7 | Details |
| US3723975A | Overdue event detector | Expired / Lapsed | 1971-06-28 | 1973-03-27 | 9 | Details |
| US3723748A | Digital tachometer with symmetrical output | Expired / Lapsed | 1971-06-23 | 1973-03-27 | 10 | Details |
| US3723199A | Outdiffusion epitaxial self-isolation technique for making … | Expired / Lapsed | 1969-11-10 | 1973-03-27 | 0 | Details |
| US3721961A | Data processing subsystems | Expired / Lapsed | 1971-08-11 | 1973-03-20 | 16 | Details |
| US3720921A | Recording in reversible, photochromic medium | Expired / Lapsed | 1970-07-14 | 1973-03-13 | 12 | Details |
| US3718826A | Fet address decoder | Expired / Lapsed | 1971-06-17 | 1973-02-27 | 10 | Details |
| US3718757A | Temperature monitoring | Expired / Lapsed | 1970-12-29 | 1973-02-27 | 18 | Details |
| US3717563A | Method of adhering gold to an insulating layer on a semicon… | Expired / Lapsed | 1971-06-09 | 1973-02-20 | 0 | Details |
| US3716781A | Magnetoresistive sensing device for detection of magnetic f… | Expired / Lapsed | 1971-10-26 | 1973-02-13 | 0 | Details |
| US3716837A | Interrupt handling | Expired / Lapsed | 1971-04-22 | 1973-02-13 | 0 | Details |
| US3715747A | Capacitive keyboard electronics | Expired / Lapsed | 1971-12-30 | 1973-02-06 | 11 | Details |
| US3715729A | Timing control for a multiprocessor system | Expired / Lapsed | 1971-03-10 | 1973-02-06 | 12 | Details |
| US3715481A | Magnetic recording and reproduction apparatus for single pi… | Expired / Lapsed | 1967-08-02 | 1973-02-06 | 14 | Details |
| US3714635A | Standard adapter method and apparatus | Expired / Lapsed | 1972-01-31 | 1973-01-30 | 12 | Details |
| US3713820A | Electrophotographic charge transport layer | Expired / Lapsed | 1971-09-07 | 1973-01-30 | 0 | Details |
| US3708050A | Printer control with monodirectional and bidirectional prin… | Expired / Lapsed | 1970-10-26 | 1973-01-02 | 7 | Details |
| US3707725A | Program execution tracing system improvements | Expired / Lapsed | 1970-06-19 | 1972-12-26 | 14 | Details |
| US3707455A | Measuring system | Expired / Lapsed | 1968-07-15 | 1972-12-26 | 0 | Details |
| US3706974A | Interface multiplexer | Expired / Lapsed | 1971-10-27 | 1972-12-19 | 7 | Details |
| US3706891A | A. c. stable storage cell | Expired / Lapsed | 1971-06-17 | 1972-12-19 | 2 | Details |
| US3704363A | Statistical and environmental data logging system for data … | Expired / Lapsed | 1971-06-09 | 1972-11-28 | 4 | Details |
| US3702926A | Fet decode circuit | Expired / Lapsed | 1970-09-30 | 1972-11-14 | 30 | Details |
| US3702464A | Information card | Expired / Lapsed | 1971-05-04 | 1972-11-07 | 2 | Details |
| US3702006A | Method for balancing the utilization of input/output devices | Expired / Lapsed | 1971-06-09 | 1972-10-31 | 26 | Details |
| US3701099A | Dynamic discrimination reference level generator for a para… | Expired / Lapsed | 1971-06-08 | 1972-10-24 | 14 | Details |
| US3700859A | Programmable key and lock | Expired / Lapsed | 1971-03-19 | 1972-10-24 | 14 | Details |
| US3701105A | A central processing unit in which all data flow passes thr… | Expired / Lapsed | 1970-07-24 | 1972-10-24 | 8 | Details |
| US3700873A | Structured computer notation and system architecture utiliz… | Expired / Lapsed | 1970-04-06 | 1972-10-24 | 24 | Details |
| US3701039A | Random binary data signal frequency and phase compensation … | Expired / Lapsed | 1968-10-28 | 1972-10-24 | 4 | Details |
| US3699296A | Catastrophically buckling compression column switch and act… | Expired / Lapsed | 1971-05-21 | 1972-10-17 | 17 | Details |
| US3699312A | Code scanning system | Expired / Lapsed | 1971-03-18 | 1972-10-17 | 12 | Details |
| US3699530A | Input/output system with dedicated channel buffering | Expired / Lapsed | 1970-12-30 | 1972-10-17 | 12 | Details |
| US3693165A | Parallel addressing of a storage hierarchy in a data proces… | Expired / Lapsed | 1971-06-29 | 1972-09-19 | 27 | Details |
| US3692936A | Acoustic coordinate data determination system | Expired / Lapsed | 1970-06-18 | 1972-09-19 | 14 | Details |
| US3690760A | Electrostatic printing system | Expired / Lapsed | 1971-04-05 | 1972-09-12 | 21 | Details |
| US3688280A | Monolithic memory system with bi-level powering for reduced… | Expired / Lapsed | 1970-09-22 | 1972-08-29 | 15 | Details |
| US3686631A | Compressed coding of digitized quantities | Expired / Lapsed | 1969-11-04 | 1972-08-22 | 7 | Details |
| US3682729A | Method of changing the physical properties of a metallic fi… | Expired / Lapsed | 1969-12-30 | 1972-08-08 | 0 | Details |
| US3681682A | Method and apparatus for testing gap surface finish and win… | Expired / Lapsed | 1970-12-21 | 1972-08-01 | 18 | Details |
| US3680077A | Method of scrolling information displayed on cathode ray tu… | Expired / Lapsed | 1970-07-31 | 1972-07-25 | 40 | Details |
| US3680054A | Input/output channel | Expired / Lapsed | 1970-07-06 | 1972-07-25 | 14 | Details |
| US3678475A | Read only memory and method of using same | Expired / Lapsed | 1971-02-01 | 1972-07-18 | 28 | Details |
| US3676860A | Interactive tie-breaking system | Expired / Lapsed | 1970-12-28 | 1972-07-11 | 12 | Details |
| US3676616A | Eds serial switch array | Expired / Lapsed | 1970-12-21 | 1972-07-11 | 19 | Details |
| US3676852A | Multiple program digital computer | Expired / Lapsed | 1970-07-20 | 1972-07-11 | 13 | Details |
| US3676615A | Pushbutton keyboard switch array and associated printed cir… | Expired / Lapsed | 1970-07-13 | 1972-07-11 | 16 | Details |
| US3676644A | Coded document and system for automatically reading same | Expired / Lapsed | 1970-03-05 | 1972-07-11 | 18 | Details |
| US3675133A | Apparatus and method independently varying the widths of a … | Expired / Lapsed | 1971-06-21 | 1972-07-04 | 17 | Details |
| US3675216A | No clock shift register and control technique | Expired / Lapsed | 1971-01-08 | 1972-07-04 | 11 | Details |
| US3675215A | Pseudo-random code implemented variable block-size storage … | Expired / Lapsed | 1970-06-29 | 1972-07-04 | 17 | Details |
| US3675217A | Sequence interlocking and priority apparatus | Expired / Lapsed | 1969-12-23 | 1972-07-04 | 22 | Details |
| US3673575A | Microprogrammed common control unit with double format cont… | Expired / Lapsed | 1970-06-29 | 1972-06-27 | 8 | Details |
| US3673594A | Photocopying device | Expired / Lapsed | 1970-03-16 | 1972-06-27 | 14 | Details |
| US3670307A | Interstorage transfer mechanism | Expired / Lapsed | 1969-12-23 | 1972-06-13 | 11 | Details |
| US3670309A | Storage control system | Expired / Lapsed | 1969-12-23 | 1972-06-13 | 33 | Details |
| US3668356A | Mechanical key actuator including a cantilever beam restori… | Expired / Lapsed | 1971-01-04 | 1972-06-06 | 15 | Details |
| US3668651A | Working device code method of i/o control | Expired / Lapsed | 1970-12-30 | 1972-06-06 | 15 | Details |
| US3668429A | Sense amplifier latch for monolithic memories | Expired / Lapsed | 1970-09-22 | 1972-06-06 | 6 | Details |
| US3668658A | Magnetic record disk cover | Expired / Lapsed | 1969-12-22 | 1972-06-06 | 9 | Details |
| US3665513A | Passive magnetic transfer of discrete magnetic information | Expired / Lapsed | 1969-12-29 | 1972-05-23 | 13 | Details |
| US3665173A | Triple modular redundancy/sparing | Expired / Lapsed | 1968-09-03 | 1972-05-23 | 16 | Details |
| US3665418A | Status switching in an automatically repaired computer | Expired / Lapsed | 1968-07-15 | 1972-05-23 | 16 | Details |
| US3663194A | Method for making monolithic opto-electronic structure | Expired / Lapsed | 1970-05-25 | 1972-05-16 | 5 | Details |
| US3663749A | Slow scan video method and system | Expired / Lapsed | 1969-11-24 | 1972-05-16 | 15 | Details |
| US3662341A | Video-derived segmentation-gating apparatus for optical cha… | Expired / Lapsed | 1970-09-25 | 1972-05-09 | 12 | Details |
| US3662348A | Message assembly and response system | Expired / Lapsed | 1970-06-30 | 1972-05-09 | 11 | Details |
| US3661636A | Process for forming uniform and smooth surfaces | Expired / Lapsed | 1970-04-22 | 1972-05-09 | 13 | Details |
| US3660616A | Dictating and transcribing systems featuring random sentenc… | Expired / Lapsed | 1970-06-29 | 1972-05-02 | 8 | Details |
| US3659273A | Error checking arrangement | Expired / Lapsed | 1970-05-26 | 1972-04-25 | 4 | Details |
| US3657524A | Dual mode process control with continuous feedback during c… | Expired / Lapsed | 1970-06-15 | 1972-04-18 | 12 | Details |
| US3655457A | Method of making or modifying a pn-junction by ion implanta… | Expired / Lapsed | 1968-08-06 | 1972-04-11 | 30 | Details |
| US3654617A | Microprogrammable i/o controller | Expired / Lapsed | 1970-10-01 | 1972-04-04 | 26 | Details |
| US3654615A | Element placement system | Expired / Lapsed | 1965-12-01 | 1972-04-04 | 23 | Details |
| US3651485A | Holographic data processing system | Expired / Lapsed | 1969-10-16 | 1972-03-21 | 10 | Details |
| US3650737A | Imaging method using photoconductive element having a prote… | Expired / Lapsed | 1968-03-25 | 1972-03-21 | 1 | Details |
| US3647977A | Multiplexer | Expired / Lapsed | 1970-05-07 | 1972-03-07 | 15 | Details |
| US3648271A | Visual editing system incorporating selectable letter spaci… | Expired / Lapsed | 1970-03-02 | 1972-03-07 | 10 | Details |
| US3648254A | High-speed associative memory | Expired / Lapsed | 1969-12-31 | 1972-03-07 | 23 | Details |
| US3648237A | Apparatus and method for obtaining synchronization of a max… | Expired / Lapsed | 1969-02-28 | 1972-03-07 | 9 | Details |
| US3646525A | Data regeneration scheme without using memory sense amplifi… | Expired / Lapsed | 1970-01-12 | 1972-02-29 | 9 | Details |
| US3644902A | Memory with reconfiguration to avoid uncorrectable errors | Expired / Lapsed | 1970-05-18 | 1972-02-22 | 14 | Details |
| US3643135A | Triaxially expandable circuit arrays | Expired / Lapsed | 1970-06-29 | 1972-02-15 | 12 | Details |
| US3643116A | Fast logic using ultrashort laser pulses | Expired / Lapsed | 1969-09-05 | 1972-02-15 | 29 | Details |
| US3641558A | Multiplexed video generation | Expired / Lapsed | 1969-11-21 | 1972-02-08 | 8 | Details |
| US3640271A | Blood flow pressure measurement technique employing injecte… | Expired / Lapsed | 1969-06-30 | 1972-02-08 | 9 | Details |
| US3639904A | Data communication system of loop configuration and serial … | Expired / Lapsed | 1970-05-05 | 1972-02-01 | 19 | Details |
| US3639694A | Time division multiplex communications system | Expired / Lapsed | 1969-01-15 | 1972-02-01 | 18 | Details |
| US3636443A | Method of testing devices using untested devices as a refer… | Expired / Lapsed | 1970-10-29 | 1972-01-18 | 15 | Details |
| US3636429A | Logic circuitry for providing stopping control for stepping… | Expired / Lapsed | 1970-05-08 | 1972-01-18 | 8 | Details |
| US3633995A | Acousto-optic light deflection system | Expired / Lapsed | 1970-02-17 | 1972-01-11 | 10 | Details |
| US3634665A | System use of self-testing checking circuits | Expired / Lapsed | 1969-06-30 | 1972-01-11 | 10 | Details |
| US3634830A | Modular computer sharing system with intercomputer communic… | Expired / Lapsed | 1969-06-13 | 1972-01-11 | 2 | Details |
| US3633168A | Line control adapter for a synchronous digital-formatted me… | Expired / Lapsed | 1971-03-09 | 1972-01-04 | 10 | Details |
| US3633186A | Transducer accessing mechanism utilizing centrifugal force | Expired / Lapsed | 1970-07-02 | 1972-01-04 | 9 | Details |
| US3633170A | Digital filter and threshold circuit | Expired / Lapsed | 1970-06-09 | 1972-01-04 | 13 | Details |
| US3633100A | Testing of nonlinear circuits by comparison with a referenc… | Expired / Lapsed | 1970-05-12 | 1972-01-04 | 51 | Details |
| US3633113A | Timed pulse train generating system | Expired / Lapsed | 1969-12-22 | 1972-01-04 | 5 | Details |
| US3629853A | Data-processing element | Expired / Lapsed | 1959-06-30 | 1971-12-21 | 58 | Details |
| US3627096A | Wire printing method | Expired / Lapsed | 1969-04-25 | 1971-12-14 | 8 | Details |
| US3626320A | Image display apparatus | Expired / Lapsed | 1970-10-05 | 1971-12-07 | 4 | Details |
| US3626084A | Deformographic storage display tube | Expired / Lapsed | 1970-06-12 | 1971-12-07 | 22 | Details |
| US3626334A | Electrically variable acoustic delay line | Expired / Lapsed | 1969-12-30 | 1971-12-07 | 16 | Details |
| US3626328A | Semiconductor bulk oscillator | Expired / Lapsed | 1969-04-01 | 1971-12-07 | 17 | Details |
| US3623022A | Multiplexing system for interleaving operations of a proces… | Expired / Lapsed | 1969-12-29 | 1971-11-23 | 13 | Details |
| US3623155A | Optimum apparatus and method for check bit generation and e… | Expired / Lapsed | 1969-12-24 | 1971-11-23 | 26 | Details |
| US3623158A | Data processing system including nonassociative data store … | Expired / Lapsed | 1969-11-10 | 1971-11-23 | 13 | Details |
| US3623012A | Accounting system with program by example facilities | Expired / Lapsed | 1969-06-30 | 1971-11-23 | 8 | Details |
| US3622382A | Semiconductor isolation structure and method of producing | Expired / Lapsed | 1969-05-05 | 1971-11-23 | 8 | Details |
| US3622793A | Fiber optic light transmitting assembly compensating for sh… | Expired / Lapsed | 1969-03-28 | 1971-11-23 | 3 | Details |
| US3623068A | Serving display functions by means of coded space informati… | Expired / Lapsed | 1969-01-08 | 1971-11-23 | 12 | Details |
| US3622767A | Adaptive control system and method | Expired / Lapsed | 1967-01-16 | 1971-11-23 | 14 | Details |
| US3621346A | Process for forming semiconductor devices with polycrystall… | Expired / Lapsed | 1970-01-28 | 1971-11-16 | 5 | Details |
| US3619507A | Transmit only acoustic coupler | Expired / Lapsed | 1969-08-22 | 1971-11-09 | 7 | Details |
| US3619283A | Method for epitaxially growing thin films | Expired / Lapsed | 1968-09-27 | 1971-11-09 | 11 | Details |
| US3619282A | Method for vapor growing ternary compounds | Expired / Lapsed | 1968-09-27 | 1971-11-09 | 4 | Details |
| US3618028A | Local storage facility | Expired / Lapsed | 1970-04-20 | 1971-11-02 | 10 | Details |
| US3617816A | Composite metallurgy stripe for semiconductor devices | Expired / Lapsed | 1970-02-02 | 1971-11-02 | 5 | Details |
| US3617378A | Magnetic recording media | Expired / Lapsed | 1969-09-29 | 1971-11-02 | 4 | Details |
| US3614745A | Apparatus and method in a multiple operand stream computing… | Expired / Lapsed | 1969-09-15 | 1971-10-19 | 6 | Details |
| US3614608A | Random number statistical logic test system | Expired / Lapsed | 1969-05-19 | 1971-10-19 | 14 | Details |
| US3612698A | Automatic holographic wafer positioning system and method | Expired / Lapsed | 1969-05-01 | 1971-10-12 | 13 | Details |
| US3611134A | Apparatus for automatically measuring time intervals using … | Expired / Lapsed | 1969-04-30 | 1971-10-05 | 15 | Details |
| US3611071A | Inversion prevention system for semiconductor devices | Expired / Lapsed | 1969-04-10 | 1971-10-05 | 2 | Details |
| US3611307A | Execution unit shared by plurality of arrays of virtual pro… | Expired / Lapsed | 1969-04-03 | 1971-10-05 | 13 | Details |
| US3610902A | Electronic statistical calculator and display system | Expired / Lapsed | 1968-10-07 | 1971-10-05 | 19 | Details |
| US3609393A | Bidirectional dynamic shift register | Expired / Lapsed | 1969-06-30 | 1971-09-28 | 30 | Details |
| US3609712A | Insulated gate field effect transistor memory array | Expired / Lapsed | 1969-01-15 | 1971-09-28 | 29 | Details |
| US3609697A | Program security device | Expired / Lapsed | 1968-10-21 | 1971-09-28 | 4 | Details |
| US3607468A | Method of forming shallow junction semiconductor devices | Expired / Lapsed | 1968-10-07 | 1971-09-21 | 4 | Details |
| US3604549A | Dual feed rate ribbon mechanism and supply cartridge theref… | Expired / Lapsed | 1968-07-16 | 1971-09-14 | 9 | Details |
| US3603936A | Microprogrammed data processing system | Expired / Lapsed | 1969-12-08 | 1971-09-07 | 26 | Details |
| US3603938A | Drive system for a memory array | Expired / Lapsed | 1969-06-30 | 1971-09-07 | 3 | Details |
| US3602635A | Micro-circuit device | Expired / Lapsed | 1970-06-30 | 1971-08-31 | 6 | Details |
| US3602703A | Power demand predicting control system | Expired / Lapsed | 1969-10-20 | 1971-08-31 | 11 | Details |
| US3602894A | Program change control system | Expired / Lapsed | 1969-06-23 | 1971-08-31 | 12 | Details |
| US3601807A | Centralized crosspoint switching unit | Expired / Lapsed | 1969-01-13 | 1971-08-24 | 13 | Details |
| US3600218A | Method for depositing insulating films of silicon nitride a… | Expired / Lapsed | 1968-05-15 | 1971-08-17 | 0 | Details |
| US3599151A | Character recognition photosensing apparatus having a thres… | Expired / Lapsed | 1969-12-29 | 1971-08-10 | 12 | Details |
| US3598582A | Photoconductive element exhibiting photoconductive dichrois… | Expired / Lapsed | 1967-09-18 | 1971-08-10 | 0 | Details |
| US3597660A | High-density circuits connector | Expired / Lapsed | 1969-12-10 | 1971-08-03 | 32 | Details |
| US3597045A | Automatic wafer identification system and method | Expired / Lapsed | 1969-06-30 | 1971-08-03 | 11 | Details |
| US3596228A | Fluid actuated contactor | Expired / Lapsed | 1969-05-29 | 1971-07-27 | 26 | Details |
| US3593297A | Diagnostic system for trapping circuitry | Expired / Lapsed | 1970-02-12 | 1971-07-13 | 7 | Details |
| US3593115A | Capacitive voltage divider | Expired / Lapsed | 1969-09-10 | 1971-07-13 | 39 | Details |
| US3592311A | Wire printing head | Expired / Lapsed | 1968-10-02 | 1971-07-13 | 13 | Details |
| US3593300A | Arrangement for automatically selecting units for task exec… | Expired / Lapsed | 1967-11-13 | 1971-07-13 | 8 | Details |
| US3593299A | Input-output control system for data processing apparatus | Expired / Lapsed | 1967-07-14 | 1971-07-13 | 5 | Details |
| US3591834A | Circuit board connecting means | Expired / Lapsed | 1969-12-22 | 1971-07-06 | 8 | Details |
| US3591482A | Silver-silver chloride electrode and method of making same | Expired / Lapsed | 1969-04-23 | 1971-07-06 | 0 | Details |
| US3591784A | Real time digital fourier analyzer | Expired / Lapsed | 1968-10-17 | 1971-07-06 | 29 | Details |
| US3591480A | Glucose measuring system | Expired / Lapsed | 1968-07-15 | 1971-07-06 | 0 | Details |
| US3588839A | Hierarchical memory updating system | Expired / Lapsed | 1969-01-15 | 1971-06-28 | 0 | Details |
| US3588829A | Integrated memory system with block transfer to a buffer st… | Expired / Lapsed | 1968-11-14 | 1971-06-28 | 0 | Details |
| US3588855A | Data gap responding apparatus | Expired / Lapsed | 1968-10-14 | 1971-06-28 | 0 | Details |
| US3587028A | Coaxial connector guide and grounding structure | Expired / Lapsed | 1969-04-28 | 1971-06-22 | 9 | Details |
| US3585500A | Dynamic time/voltage test system | Expired / Lapsed | 1969-08-11 | 1971-06-15 | 17 | Details |
| US3585378A | Error detection scheme for memories | Expired / Lapsed | 1969-06-30 | 1971-06-15 | 13 | Details |
| US3585605A | Associative memory data processor | Expired / Lapsed | 1969-05-28 | 1971-06-15 | 17 | Details |
| US3585088A | Methods of producing single crystals on supporting substrat… | Expired / Lapsed | 1968-10-18 | 1971-06-15 | 0 | Details |
| US3585599A | Universal system service adapter | Expired / Lapsed | 1968-07-09 | 1971-06-15 | 41 | Details |
| US3585588A | Supplementary scan lexical symbol identifier | Expired / Lapsed | 1967-10-03 | 1971-06-15 | 7 | Details |
| US3584162A | Electrical keyboard switch mechanism with improved resilien… | Expired / Lapsed | 1970-02-16 | 1971-06-08 | 11 | Details |
| US3584205A | Binary arithmetic and logic manipulator | Expired / Lapsed | 1968-10-14 | 1971-06-08 | 13 | Details |
| US3582865A | Microcircuit module and connector | Expired / Lapsed | 1969-12-16 | 1971-06-01 | 18 | Details |
| US3581375A | Method and apparatus for manufacturing integrated circuits | Expired / Lapsed | 1969-03-07 | 1971-06-01 | 0 | Details |
| US3582917A | Magnetic head having a continuously variable radius of curv… | Expired / Lapsed | 1968-12-13 | 1971-06-01 | 8 | Details |
| US3582901A | Random data acquisition interface system | Expired / Lapsed | 1968-10-01 | 1971-06-01 | 36 | Details |
| US3581286A | Module switching apparatus with status sensing and dynamic … | Expired / Lapsed | 1969-01-13 | 1971-05-25 | 30 | Details |
| US3578906A | Close circuit television measurement system | Expired / Lapsed | 1969-11-24 | 1971-05-18 | 16 | Details |
| US3579200A | Data processing system | Expired / Lapsed | 1969-07-30 | 1971-05-18 | 53 | Details |
| US3579195A | Data system incorporating method and apparatus for referenc… | Expired / Lapsed | 1968-11-05 | 1971-05-18 | 96 | Details |
| US3579213A | Magnetic head accessing mechanism utilizing spring bias | Expired / Lapsed | 1968-04-17 | 1971-05-18 | 6 | Details |
| US3577185A | On-line system for measuring the efficiency of replacement … | Expired / Lapsed | 1969-10-02 | 1971-05-04 | 15 | Details |
| US3576969A | Solder reflow device | Expired / Lapsed | 1969-09-02 | 1971-05-04 | 2 | Details |
| US3577189A | Apparatus and method in a digital computer for allowing imp… | Expired / Lapsed | 1969-01-15 | 1971-05-04 | 20 | Details |
| US3577047A | Field effect device | Expired / Lapsed | 1969-01-15 | 1971-05-04 | 4 | Details |
| US3577037A | Diffused electrical connector apparatus and method of makin… | Expired / Lapsed | 1968-07-05 | 1971-05-04 | 0 | Details |
| US3577140A | Triple integrating ramp analog-to-digital converter | Expired / Lapsed | 1967-06-27 | 1971-05-04 | 18 | Details |
| US3576544A | Storage protection system | Expired / Lapsed | 1968-10-18 | 1971-04-27 | 6 | Details |
| US3576367A | Machine for preparing documents | Expired / Lapsed | 1968-09-06 | 1971-04-27 | 12 | Details |
| US3576553A | Data transducer positioning servo utilizing compensation ne… | Expired / Lapsed | 1968-04-29 | 1971-04-27 | 24 | Details |
| US3576574A | Light pen tracking unit with alternative tracking patterns | Expired / Lapsed | 1968-01-15 | 1971-04-27 | 12 | Details |
| US3575301A | Manipulator | Expired / Lapsed | 1968-01-02 | 1971-04-20 | 35 | Details |
| US3575740A | Method of fabricating planar dielectric isolated integrated… | Expired / Lapsed | 1967-06-08 | 1971-04-20 | 0 | Details |
| US3573730A | Stored logic recognition device | Expired / Lapsed | 1969-10-15 | 1971-04-06 | 10 | Details |
| US3573749A | Operator guidance and control termianl | Expired / Lapsed | 1969-03-28 | 1971-04-06 | 10 | Details |
| US3573758A | Non-linear impedance means for transistors connected to eac… | Expired / Lapsed | 1969-02-27 | 1971-04-06 | 38 | Details |
| US3573728A | Memory with error correction for partial store operation | Expired / Lapsed | 1969-01-09 | 1971-04-06 | 12 | Details |
| US3573789A | Method and apparatus for increasing image resolution | Expired / Lapsed | 1968-12-13 | 1971-04-06 | 12 | Details |
| US3573741A | Control unit for input/output devices | Expired / Lapsed | 1968-07-11 | 1971-04-06 | 15 | Details |
| US3573736A | Interruption and interlock arrangement | Expired / Lapsed | 1968-01-15 | 1971-04-06 | 5 | Details |
| US3573738A | Demand computer system for machine tool control | Expired / Lapsed | 1968-01-15 | 1971-04-06 | 10 | Details |
| US3573737A | Reduction of processor loading in a demand computer system … | Expired / Lapsed | 1968-01-15 | 1971-04-06 | 8 | Details |
| US3573981A | Method and apparatus for inducing uniaxial anisotropy in ma… | Expired / Lapsed | 1967-12-14 | 1971-04-06 | 0 | Details |
| US3573973A | High speed additive circuit process | Expired / Lapsed | 1967-11-13 | 1971-04-06 | 0 | Details |
| US3573099A | Process for making garnet films | Expired / Lapsed | 1969-12-22 | 1971-03-30 | 0 | Details |
| US3571797A | Area-format control in a character-recogniton system | Expired / Lapsed | 1969-06-02 | 1971-03-23 | 16 | Details |
| US3571806A | Variable-speed line adapter for synchronous transmissions | Expired / Lapsed | 1969-01-14 | 1971-03-23 | 8 | Details |
| US3571733A | Adaptive delay line equalizer for waveforms with correlatio… | Expired / Lapsed | 1968-09-13 | 1971-03-23 | 8 | Details |
| US3571685A | Numerical servo displacement control system | Expired / Lapsed | 1968-01-15 | 1971-03-23 | 36 | Details |
| US3569814A | Programmed digital servo control including repeated command… | Expired / Lapsed | 1969-01-17 | 1971-03-09 | 16 | Details |
| US3569957A | Analogue to digital converter with isolated inputs | Expired / Lapsed | 1968-12-23 | 1971-03-09 | 12 | Details |
| US3569905A | Electrical connector with cam action | Expired / Lapsed | 1968-11-19 | 1971-03-09 | 12 | Details |
| US3569938A | Storage manager | Expired / Lapsed | 1967-12-20 | 1971-03-09 | 21 | Details |
| US3567852A | Film display system | Expired / Lapsed | 1968-10-01 | 1971-03-02 | 11 | Details |
| US3568153A | Memory with error correction | Expired / Lapsed | 1968-09-16 | 1971-03-02 | 9 | Details |
| US3568155A | Method of storing and retrieving records | Expired / Lapsed | 1967-04-10 | 1971-03-02 | 11 | Details |
| US3565514A | Light deflector system | Expired / Lapsed | 1968-11-15 | 1971-02-23 | 0 | Details |
| US3566363A | Processor to processor communication in a multiprocessor co… | Expired / Lapsed | 1968-07-11 | 1971-02-23 | 0 | Details |
| US3564145A | Serial loop data transmission system fault locator | Expired / Lapsed | 1969-04-30 | 1971-02-16 | 9 | Details |
| US3564595A | Data interpolation for computer control of machine tools | Expired / Lapsed | 1968-11-19 | 1971-02-16 | 0 | Details |
| US3564510A | Selection,distribution and display system | Expired / Lapsed | 1968-06-20 | 1971-02-16 | 0 | Details |
| US3564506A | Instruction retry byte counter | Expired / Lapsed | 1968-01-17 | 1971-02-16 | 0 | Details |
| US3564502A | Channel position signaling method and means | Expired / Lapsed | 1968-01-15 | 1971-02-16 | 0 | Details |
| US3562536A | Radiation sensitive semiconductor wafer identification syst… | Expired / Lapsed | 1968-08-30 | 1971-02-09 | 7 | Details |
| US3560934A | Arrangement for effecting vector mode operation in multipro… | Expired / Lapsed | 1969-06-10 | 1971-02-02 | 0 | Details |
| US3560675A | Depressible diaphragm overlay switch for displays | Expired / Lapsed | 1969-05-26 | 1971-02-02 | 8 | Details |
| US3560931A | Circuitry to improve resolution in character recognition | Expired / Lapsed | 1969-03-26 | 1971-02-02 | 0 | Details |
| US3560751A | Optical mark sensing device | Expired / Lapsed | 1969-02-07 | 1971-02-02 | 9 | Details |
| US3560930A | Method and apparatus for reducing data in a pattern recogni… | Expired / Lapsed | 1968-01-15 | 1971-02-02 | 0 | Details |
| US3560754A | Photoelectric particle separator using time delay | Expired / Lapsed | 1965-11-17 | 1971-02-02 | 21 | Details |
| US3559167A | Self-checking error checker for two-rail coded data | Expired / Lapsed | 1968-07-25 | 1971-01-26 | 0 | Details |
| US3559183A | Instruction sequence control | Expired / Lapsed | 1968-02-29 | 1971-01-26 | 0 | Details |
| US3559181A | Crt parameter error indicator panel | Expired / Lapsed | 1967-12-14 | 1971-01-26 | 0 | Details |
| US3559083A | Digital demodulator for frequency shift keying systems | Expired / Lapsed | 1967-10-13 | 1971-01-26 | 0 | Details |
| US3554640A | Drive coupling system | Expired / Lapsed | 1968-11-25 | 1971-01-12 | 0 | Details |
| US3555517A | Early error detection system for data processing machine | Expired / Lapsed | 1968-10-30 | 1971-01-12 | 0 | Details |
| US3553655A | Short forward conditional skip hardware | Expired / Lapsed | 1969-03-28 | 1971-01-05 | 0 | Details |
| US3552383A | Method and system for estimation of arterial pressure | Expired / Lapsed | 1969-01-08 | 1971-01-05 | 33 | Details |
| US3551892A | Interaction in a multi-processing system utilizing central … | Expired / Lapsed | 1969-01-15 | 1970-12-29 | 0 | Details |
| US3551616A | Multiple switch encoding device | Expired / Lapsed | 1969-01-15 | 1970-12-29 | 0 | Details |
| US3551115A | Apparatus for growing single crystals | Expired / Lapsed | 1968-05-22 | 1970-12-29 | 0 | Details |
| US3551836A | Differential amplifier circuit adapted for monolithic fabri… | Expired / Lapsed | 1968-01-17 | 1970-12-29 | 0 | Details |
| US3551895A | Look-ahead branch detection system | Expired / Lapsed | 1968-01-15 | 1970-12-29 | 0 | Details |
| US3551896A | Deductive light pen tracking system | Expired / Lapsed | 1968-01-15 | 1970-12-29 | 0 | Details |
| US3550133A | Automatic channel apparatus | Expired / Lapsed | 1969-01-14 | 1970-12-22 | 0 | Details |
| US3547716A | Isolation in epitaxially grown monolithic devices | Expired / Lapsed | 1968-09-05 | 1970-12-15 | 0 | Details |
| US3548177A | Computer error anticipator and cycle extender | Expired / Lapsed | 1968-01-18 | 1970-12-15 | 0 | Details |
| US3548385A | Adaptive information retrieval system | Expired / Lapsed | 1968-01-11 | 1970-12-15 | 0 | Details |
| US3546582A | Computer controlled test system for performing functional t… | Expired / Lapsed | 1968-01-15 | 1970-12-08 | 0 | Details |
| US3544974A | Data processing system including buffered operands and mean… | Expired / Lapsed | 1968-04-01 | 1970-12-01 | 0 | Details |
| US3544966A | Method and apparatus for multiplex control of a plurality o… | Expired / Lapsed | 1966-12-27 | 1970-12-01 | 0 | Details |
| US3543246A | Priority selector signalling device | Expired / Lapsed | 1967-07-07 | 1970-11-24 | 0 | Details |
| US3543242A | Multiple level priority system | Expired / Lapsed | 1967-07-07 | 1970-11-24 | 0 | Details |
| US3542448A | Holographic recording and readout of digital information | Expired / Lapsed | 1967-01-13 | 1970-11-24 | 0 | Details |
| US3541529A | Replacement system | Expired / Lapsed | 1969-09-22 | 1970-11-17 | 0 | Details |
| US3541441A | Test system for evaluating amplitude and response character… | Expired / Lapsed | 1969-02-17 | 1970-11-17 | 0 | Details |
| US3541528A | Implicit load and store mechanism | Expired / Lapsed | 1969-01-06 | 1970-11-17 | 0 | Details |
| US3540794A | Multilayer digital light deflector | Expired / Lapsed | 1968-09-04 | 1970-11-17 | 0 | Details |
| US3541524A | Time division communications processor | Expired / Lapsed | 1968-03-14 | 1970-11-17 | 0 | Details |
| US3541520A | Time-sharing arrangement | Expired / Lapsed | 1967-12-18 | 1970-11-17 | 0 | Details |
| US3541507A | Error checked selection circuit | Expired / Lapsed | 1967-12-06 | 1970-11-17 | 0 | Details |
| US3541418A | Proportional damping for motor drive | Expired / Lapsed | 1967-09-05 | 1970-11-17 | 0 | Details |
| US3541516A | Vector arithmetic multiprocessor computing system | Expired / Lapsed | 1965-06-30 | 1970-11-17 | 0 | Details |
| US3540003A | Computer monitoring system | Expired / Lapsed | 1968-06-10 | 1970-11-10 | 0 | Details |
| US3540002A | Content addressable memory | Expired / Lapsed | 1968-02-26 | 1970-11-10 | 0 | Details |
| US3539996A | Data processing machine function indicator | Expired / Lapsed | 1968-01-15 | 1970-11-10 | 0 | Details |
| US3540000A | Criss-cross sorting method and means | Expired / Lapsed | 1967-11-02 | 1970-11-10 | 0 | Details |
| US3539994A | Adaptive template pattern categorizing system | Expired / Lapsed | 1967-09-14 | 1970-11-10 | 0 | Details |
| US3539999A | Control unit for multiple graphic and alphanumeric displays | Expired / Lapsed | 1967-08-08 | 1970-11-10 | 0 | Details |
| US3539993A | High-speed registration technique for position code scanning | Expired / Lapsed | 1967-02-28 | 1970-11-10 | 0 | Details |
| US3536950A | Calibration error detection and correction in a document re… | Expired / Lapsed | 1968-07-15 | 1970-10-27 | 0 | Details |
| US3536484A | Small molecule heterocyclic photoconductors and their use i… | Expired / Lapsed | 1967-12-15 | 1970-10-27 | 0 | Details |
| US3535699A | Complenmentary transistor memory cell using leakage current… | Expired / Lapsed | 1968-01-15 | 1970-10-20 | 0 | Details |
| US3534470A | Process for assembling magnetic tape heads using a consumab… | Expired / Lapsed | 1968-01-04 | 1970-10-20 | 0 | Details |
| US3535137A | Method of fabricating etch resistant masks | Expired / Lapsed | 1967-01-13 | 1970-10-20 | 0 | Details |
| US3534344A | Method and apparatus for recording and detecting information | Expired / Lapsed | 1967-12-21 | 1970-10-13 | 0 | Details |
| US3534334A | Automatic control of a threshold in the digitization of an … | Expired / Lapsed | 1967-06-20 | 1970-10-13 | 0 | Details |
| US3534264A | Adaptive digital communication system | Expired / Lapsed | 1966-04-15 | 1970-10-13 | 2 | Details |
| US3532412A | Package for and method of packaging pathology specimens | Expired / Lapsed | 1969-01-17 | 1970-10-06 | 0 | Details |
| US3532431A | Shearing interferometry by means of holography | Expired / Lapsed | 1968-02-05 | 1970-10-06 | 0 | Details |
| US3533082A | Instruction retry apparatus including means for restoring t… | Expired / Lapsed | 1968-01-15 | 1970-10-06 | 0 | Details |
| US3533075A | Dynamic address translation unit with look-ahead | Expired / Lapsed | 1967-10-19 | 1970-10-06 | 0 | Details |
| US3529703A | Closed loop spring clutch | Expired / Lapsed | 1968-06-14 | 1970-09-22 | 0 | Details |
| US3528062A | Program interlock arrangement,including task suspension and… | Expired / Lapsed | 1968-07-05 | 1970-09-08 | 0 | Details |
| US3528061A | Interlock arrangement | Expired / Lapsed | 1968-07-05 | 1970-09-08 | 0 | Details |
| US3527312A | Tone actuated dictation systems | Expired / Lapsed | 1968-06-17 | 1970-09-08 | 0 | Details |
| US3528058A | Character recognition system | Expired / Lapsed | 1966-05-27 | 1970-09-08 | 0 | Details |
| US3525140A | Micro-motion device | Expired / Lapsed | 1968-05-22 | 1970-08-25 | 0 | Details |
| US3523706A | Apparatus for supporting articles without structural contac… | Expired / Lapsed | 1967-10-27 | 1970-08-11 | 0 | Details |
| US3524113A | Complementary pnp-npn transistors and fabrication method th… | Expired / Lapsed | 1967-06-15 | 1970-08-11 | 0 | Details |
| US3523824A | Metallization of plastic materials | Expired / Lapsed | 1966-12-29 | 1970-08-11 | 0 | Details |
| US3524181A | Display system | Expired / Lapsed | 1966-06-13 | 1970-08-11 | 0 | Details |
| US3524182A | Display system | Expired / Lapsed | 1966-06-13 | 1970-08-11 | 0 | Details |
| US3523229A | Digital-analog servo system | Expired / Lapsed | 1967-01-05 | 1970-08-04 | 0 | Details |
| US3522597A | Execution plotter | Expired / Lapsed | 1965-11-19 | 1970-08-04 | 0 | Details |
| US3521141A | Leakage controlled electric charge switching and storing ci… | Expired / Lapsed | 1967-10-30 | 1970-07-21 | 0 | Details |
| US3517592A | Reciprocating lens photocomposer | Expired / Lapsed | 1967-11-14 | 1970-06-30 | 0 | Details |
| US3517337A | Modulation of scanning beams in injection lasers | Expired / Lapsed | 1967-10-26 | 1970-06-23 | 0 | Details |
| US3517258A | Solid state display device using light emitting diodes | Expired / Lapsed | 1966-10-31 | 1970-06-23 | 0 | Details |
| US3517387A | Character isolation apparatus | Expired / Lapsed | 1966-05-09 | 1970-06-23 | 0 | Details |
| US3516013A | Scanning laser having a conjugate concentric cavity so that… | Expired / Lapsed | 1968-06-10 | 1970-06-02 | 0 | Details |
| US3516021A | Field effect transistor microwave generator | Expired / Lapsed | 1967-12-05 | 1970-06-02 | 0 | Details |
| US3510658A | Light beam servoing system with memory element having wavel… | Expired / Lapsed | 1967-11-06 | 1970-05-05 | 0 | Details |
| US3508038A | Multiplying apparatus for performing division using success… | Expired / Lapsed | 1966-08-30 | 1970-04-21 | 0 | Details |
| US3505573A | Low standby power memory cell | Expired / Lapsed | 1968-09-30 | 1970-04-07 | 0 | Details |
| US3505598A | Pulse measuring system | Expired / Lapsed | 1967-08-28 | 1970-04-07 | 0 | Details |
| US3505106A | Method of forming a glass film on an object and the product… | Expired / Lapsed | 1965-09-22 | 1970-04-07 | 0 | Details |
| US3504340A | Triple error correction circuit | Expired / Lapsed | 1967-05-08 | 1970-03-31 | 0 | Details |
| US3504112A | Two-dimensional image data encoding and decoding | Expired / Lapsed | 1966-01-20 | 1970-03-31 | 0 | Details |
| US3501221A | Optical filtering | Expired / Lapsed | 1967-06-29 | 1970-03-17 | 0 | Details |
| US3500081A | Low inertia stepping motor | Expired / Lapsed | 1968-11-26 | 1970-03-10 | 0 | Details |
| US3500301A | Sonic detection apparatus | Expired / Lapsed | 1967-10-23 | 1970-03-10 | 0 | Details |
| US3500237A | Mode coupling laser apparatus | Expired / Lapsed | 1967-01-13 | 1970-03-10 | 0 | Details |
| US3500324A | Analog segmentation apparatus | Expired / Lapsed | 1966-07-27 | 1970-03-10 | 2 | Details |
| US3500328A | Data system microprogramming control | Expired / Lapsed | 1966-06-20 | 1970-03-10 | 0 | Details |
| US3499124A | Fm recording and reproducing arrangement with single carrie… | Expired / Lapsed | 1966-11-07 | 1970-03-03 | 0 | Details |
| US3497613A | Display device with video signals interleaved in segments o… | Expired / Lapsed | 1966-03-25 | 1970-02-24 | 0 | Details |
| US3497685A | Fault location system | Expired / Lapsed | 1965-11-03 | 1970-02-24 | 0 | Details |
| US3496551A | Task selection in a multi-processor computing system | Expired / Lapsed | 1967-07-13 | 1970-02-17 | 0 | Details |
| US3495134A | Rota-pak system concept | Expired / Lapsed | 1968-05-16 | 1970-02-10 | 0 | Details |
| US3495133A | Circuit structure including semiconductive chip devices joi… | Expired / Lapsed | 1968-02-27 | 1970-02-10 | 0 | Details |
| US3495097A | Signal detector circuit | Expired / Lapsed | 1967-09-14 | 1970-02-10 | 0 | Details |
| US3494550A | Universal keyboard | Expired / Lapsed | 1967-01-13 | 1970-02-10 | 0 | Details |
| US3493301A | Document processing method | Expired / Lapsed | 1966-01-26 | 1970-02-03 | 0 | Details |
| US3493932A | Integrated switching matrix comprising field-effect devices | Expired / Lapsed | 1966-01-17 | 1970-02-03 | 0 | Details |
| US3492648A | Keyboard selection system | Expired / Lapsed | 1969-04-09 | 1970-01-27 | 0 | Details |
| US3492572A | Programmable electronic circuit testing apparatus having pl… | Expired / Lapsed | 1966-10-10 | 1970-01-27 | 0 | Details |
| US3492646A | Cross correlation and decision making apparatus | Expired / Lapsed | 1965-04-26 | 1970-01-27 | 0 | Details |
| US3491325A | Temperature compensation for semiconductor devices | Expired / Lapsed | 1967-02-15 | 1970-01-20 | 0 | Details |
| US3490027A | Transistor converter amplifier circuit | Expired / Lapsed | 1967-12-05 | 1970-01-13 | 0 | Details |
| US3489622A | Method of making high frequency transistors | Expired / Lapsed | 1967-05-18 | 1970-01-13 | 0 | Details |
| US3488106A | Spatial filtering system for performing differentiation | Expired / Lapsed | 1966-10-18 | 1970-01-06 | 0 | Details |
| US3488633A | Automatic channel apparatus | Expired / Lapsed | 1964-04-06 | 1970-01-06 | 0 | Details |
| US3486149A | Variable ratio die cast pulse transformer | Expired / Lapsed | 1968-01-15 | 1969-12-23 | 0 | Details |
| US3485245A | Portable fluid heater | Expired / Lapsed | 1967-06-21 | 1969-12-23 | 0 | Details |
| US3486096A | Drive circuits for stepping motor including rapid current b… | Expired / Lapsed | 1967-05-15 | 1969-12-23 | 0 | Details |
| US3484167A | Formation flight control system | Expired / Lapsed | 1967-07-11 | 1969-12-16 | 0 | Details |
| US3484237A | Organic photoconductive compositions and their use in elect… | Expired / Lapsed | 1966-06-13 | 1969-12-16 | 0 | Details |
| US3481777A | Electroless coating method for making printed circuits | Expired / Lapsed | 1967-02-17 | 1969-12-02 | 0 | Details |
| US3482155A | Time optimal servo control system | Expired / Lapsed | 1966-12-30 | 1969-12-02 | 0 | Details |
| US3482057A | Automatic intercept system | Expired / Lapsed | 1966-01-28 | 1969-12-02 | 0 | Details |
| US3480857A | Digital method and apparatus for measuring small inductance… | Expired / Lapsed | 1967-12-27 | 1969-11-25 | 0 | Details |
| US3480914A | Control mechanism for a multi-processor computing system | Expired / Lapsed | 1967-01-03 | 1969-11-25 | 0 | Details |
| US3480922A | Magnetic film device | Expired / Lapsed | 1965-05-05 | 1969-11-25 | 0 | Details |
| US3480910A | Pulse value determining receiver | Expired / Lapsed | 1963-11-04 | 1969-11-25 | 2 | Details |
| US3479233A | Method for simultaneously forming a buried layer and surfac… | Expired / Lapsed | 1967-01-16 | 1969-11-18 | 0 | Details |
| US3479523A | Integrated nor logic circuit | Expired / Lapsed | 1966-09-26 | 1969-11-18 | 0 | Details |
| US3479642A | Threshold system | Expired / Lapsed | 1966-02-21 | 1969-11-18 | 0 | Details |
| US3479493A | Digital controller with automatic balance and manually adju… | Expired / Lapsed | 1966-01-17 | 1969-11-18 | 0 | Details |
| US3478325A | Delay line data transfer apparatus | Expired / Lapsed | 1967-01-16 | 1969-11-11 | 0 | Details |
| US3478321A | Variable priority storage accessing control | Expired / Lapsed | 1966-11-10 | 1969-11-11 | 0 | Details |
| US3478286A | System for automatically testing computer memories | Expired / Lapsed | 1965-07-01 | 1969-11-11 | 0 | Details |
| US3477063A | Controller for data processing system | Expired / Lapsed | 1967-10-26 | 1969-11-04 | 0 | Details |
| US3474021A | Method of forming openings using sequential sputtering and … | Expired / Lapsed | 1966-07-25 | 1969-10-21 | 0 | Details |
| US3473115A | Method and apparatus for testing magnetostrictive delay lin… | Expired / Lapsed | 1966-12-30 | 1969-10-14 | 0 | Details |
| US3472074A | Maximum thermometer for surface temperature measurements | Expired / Lapsed | 1966-12-29 | 1969-10-14 | 0 | Details |
| US3473093A | Semiconductor device having compensated barrier zones betwe… | Expired / Lapsed | 1965-08-18 | 1969-10-14 | 0 | Details |
| US3471778A | Method of testing an ordered,multi-element electrical circu… | Expired / Lapsed | 1967-01-13 | 1969-10-07 | 0 | Details |
| US3471342A | Wear-resistant titanium and titanium alloys and method for … | Expired / Lapsed | 1966-07-29 | 1969-10-07 | 0 | Details |
| US3471832A | Character recognition apparatus | Expired / Lapsed | 1965-07-06 | 1969-10-07 | 0 | Details |
| US3470320A | Fibre deflection means | Expired / Lapsed | 1962-09-13 | 1969-09-30 | 0 | Details |
| US3467777A | Data transmission with phase encoding of binary state trans… | Expired / Lapsed | 1965-10-15 | 1969-09-16 | 0 | Details |
| US3466514A | Method and apparatus for positioning objects in preselected… | Expired / Lapsed | 1967-06-26 | 1969-09-09 | 0 | Details |
| US3466613A | Instruction buffering system | Expired / Lapsed | 1967-01-13 | 1969-09-09 | 0 | Details |
| US3466394A | Voice verification system | Expired / Lapsed | 1966-05-02 | 1969-09-09 | 0 | Details |
| US3466110A | Laser projector for phase modulating objects | Expired / Lapsed | 1966-03-24 | 1969-09-09 | 0 | Details |
| US3466616A | Memory device and method using dichroic defects | Expired / Lapsed | 1965-10-22 | 1969-09-09 | 0 | Details |
| US3466603A | Scanner threshold adjusting circuit | Expired / Lapsed | 1965-06-22 | 1969-09-09 | 0 | Details |
| US3465299A | Information translating data comparing systems | Expired / Lapsed | 1967-01-26 | 1969-09-02 | 0 | Details |
| US3463910A | Digit processing unit | Expired / Lapsed | 1966-01-04 | 1969-08-26 | 0 | Details |
| US3463985A | Closed loop stepping motor control system | Expired / Lapsed | 1965-06-10 | 1969-08-26 | 0 | Details |
| US3462744A | Execution unit with a common operand and resulting bussing … | Expired / Lapsed | 1966-09-28 | 1969-08-19 | 0 | Details |
| US3462741A | Automatic control of peripheral processors | Expired / Lapsed | 1966-07-25 | 1969-08-19 | 0 | Details |
| US3462737A | Character size measuring and normalizing for character reco… | Expired / Lapsed | 1964-12-18 | 1969-08-19 | 1 | Details |
| US3461454A | Position identifying device | Expired / Lapsed | 1968-06-06 | 1969-08-12 | 0 | Details |
| US3460469A | Print hammer actuator | Expired / Lapsed | 1966-12-30 | 1969-08-12 | 0 | Details |
| US3459944A | Photosensitive insulated gate field effect transistor | Expired / Lapsed | 1966-01-04 | 1969-08-05 | 0 | Details |
| US3459926A | Graphic vector generator | Expired / Lapsed | 1965-10-18 | 1969-08-05 | 0 | Details |
| US3458786A | Movable element positioning system with coarse and fine inc… | Expired / Lapsed | 1966-07-11 | 1969-07-29 | 0 | Details |
| US3458821A | Variable gain controller | Expired / Lapsed | 1966-07-05 | 1969-07-29 | 0 | Details |
| US3458688A | Document line position identification for line marking and … | Expired / Lapsed | 1965-08-09 | 1969-07-29 | 0 | Details |
| US3454775A | Information decoding apparatus employing a frequency sensit… | Expired / Lapsed | 1964-12-30 | 1969-07-08 | 0 | Details |
| US3453384A | Display system with increased manual input data rate | Expired / Lapsed | 1965-12-07 | 1969-07-01 | 0 | Details |
| US3451912A | Schottky-barrier diode formed by sputter-deposition process… | Expired / Lapsed | 1966-07-15 | 1969-06-24 | 0 | Details |
| US3452217A | Compensating reset circuit | Expired / Lapsed | 1965-12-27 | 1969-06-24 | 2 | Details |
| US3450131A | Blood pressure measuring system with korotkoff sound detect… | Expired / Lapsed | 1967-01-09 | 1969-06-17 | 0 | Details |
| US3450840A | Multiplex data transmission system using orthogonal transmi… | Expired / Lapsed | 1965-11-19 | 1969-06-17 | 0 | Details |
| US3449639A | Actuator driver circuit | Expired / Lapsed | 1966-12-30 | 1969-06-10 | 0 | Details |
| US3448282A | Optical and gate | Expired / Lapsed | 1968-01-12 | 1969-06-03 | 0 | Details |
| US3447135A | Peripheral data exchange | Expired / Lapsed | 1966-08-18 | 1969-05-27 | 0 | Details |
| US3446950A | Adaptive categorizer | Expired / Lapsed | 1963-12-31 | 1969-05-27 | 2 | Details |
| US3445822A | Communication arrangement in data processing system | Expired / Lapsed | 1967-07-14 | 1969-05-20 | 0 | Details |
| US3445167A | Optical sampling scope-stroboscope using a pulsed laser | Expired / Lapsed | 1967-01-13 | 1969-05-20 | 0 | Details |
| US3445819A | Multi-system sharing of data processing units | Expired / Lapsed | 1966-08-03 | 1969-05-20 | 0 | Details |
| US3445826A | Electro-optic storage device | Expired / Lapsed | 1966-01-03 | 1969-05-20 | 1 | Details |
| US3445264A | Method and composition for treating the surface of polymeri… | Expired / Lapsed | 1965-06-24 | 1969-05-20 | 0 | Details |
| US3444541A | Tape inter-block gap size control | Expired / Lapsed | 1965-06-21 | 1969-05-13 | 0 | Details |
| US3444550A | Logarithmic analog to digital converter | Expired / Lapsed | 1965-04-01 | 1969-05-13 | 0 | Details |
| US3443181A | Drive circuit for carriage stepping motor | Expired / Lapsed | 1966-03-28 | 1969-05-06 | 0 | Details |
| US3442683A | Production of metallic coatings upon the surfaces of other … | Expired / Lapsed | 1965-05-13 | 1969-05-06 | 0 | Details |
| US3441849A | Testing and addressing apparatus for an array of circuit el… | Expired / Lapsed | 1967-01-13 | 1969-04-29 | 0 | Details |
| US3441912A | Feedback current switch memory cell | Expired / Lapsed | 1966-01-28 | 1969-04-29 | 2 | Details |
| US3440612A | Program mode switching circuit | Expired / Lapsed | 1966-02-28 | 1969-04-22 | 0 | Details |
| US3440413A | Majority logic binary adder | Expired / Lapsed | 1965-11-17 | 1969-04-22 | 0 | Details |
| US3440546A | Variable period and pulse width delay line pulse generating… | Expired / Lapsed | 1965-11-15 | 1969-04-22 | 0 | Details |
| US3440561A | Apparatus employing electronic light shutters for switching… | Expired / Lapsed | 1964-06-25 | 1969-04-22 | 0 | Details |
| US3439331A | Error detection and correction apparatus | Expired / Lapsed | 1965-06-16 | 1969-04-15 | 0 | Details |
| US3437890A | Diffused-epitaxial scanistors | Expired / Lapsed | 1966-11-21 | 1969-04-08 | 0 | Details |
| US3436734A | Error correcting and repairable data processing storage sys… | Expired / Lapsed | 1966-06-21 | 1969-04-01 | 0 | Details |
| US3436259A | Method for plating and polishing a silicon planar surface | Expired / Lapsed | 1966-05-12 | 1969-04-01 | 2 | Details |
| US3436744A | Memory pulse program | Expired / Lapsed | 1965-08-17 | 1969-04-01 | 0 | Details |
| US3435310A | Electronic high speed strip record accessing control circui… | Expired / Lapsed | 1966-12-22 | 1969-03-25 | 0 | Details |
| US3435418A | Record retrieval and record hold system | Expired / Lapsed | 1965-05-27 | 1969-03-25 | 0 | Details |
| US3434117A | Automatic transmission speed selection control for a data t… | Expired / Lapsed | 1967-04-24 | 1969-03-18 | 0 | Details |
| US3434115A | Timed operation sequence controller | Expired / Lapsed | 1966-07-15 | 1969-03-18 | 0 | Details |
| US3434116A | Scheme for circumventing bad memory cells | Expired / Lapsed | 1966-06-15 | 1969-03-18 | 0 | Details |
| US3433686A | Process of bonding chips in a substrate recess by epitaxial… | Expired / Lapsed | 1966-01-06 | 1969-03-18 | 0 | Details |
| US3432812A | Memory system | Expired / Lapsed | 1966-07-15 | 1969-03-11 | 0 | Details |
| US3432810A | Addressing system for a computer employing a plurality of l… | Expired / Lapsed | 1966-05-31 | 1969-03-11 | 0 | Details |
| US3432813A | Apparatus for control of a plurality of peripheral devices | Expired / Lapsed | 1966-04-19 | 1969-03-11 | 0 | Details |
| US3432815A | Switching logic for a two-dimensional memory | Expired / Lapsed | 1965-02-15 | 1969-03-11 | 0 | Details |
| US3432222A | Optical scanning device | Expired / Lapsed | 1964-09-30 | 1969-03-11 | 0 | Details |
| US3428903A | Multipurpose logic circuit for performing 254 out of 256 di… | Expired / Lapsed | 1965-08-02 | 1969-02-18 | 0 | Details |
| US3427445A | Full adder using field effect transistor of the insulated g… | Expired / Lapsed | 1965-12-27 | 1969-02-11 | 0 | Details |
| US3427472A | Threshold detector employing tunnel diode-hot carrier diode… | Expired / Lapsed | 1965-11-12 | 1969-02-11 | 2 | Details |
| US3427443A | Instruction execution marker for testing computer programs | Expired / Lapsed | 1965-04-08 | 1969-02-11 | 0 | Details |
| US3427154A | Amorphous alloys and process therefor | Expired / Lapsed | 1964-09-11 | 1969-02-11 | 0 | Details |
| US3427091A | Alteration of transmittance in solids | Expired / Lapsed | 1964-08-14 | 1969-02-11 | 0 | Details |
| US3426332A | Data handling apparatus with recurrent address manipulation… | Expired / Lapsed | 1966-12-15 | 1969-02-04 | 0 | Details |
| US3426337A | Positioning system for random access device | Expired / Lapsed | 1964-12-21 | 1969-02-04 | 0 | Details |
| US3423749A | Character positioning control | Expired / Lapsed | 1966-03-30 | 1969-01-21 | 0 | Details |
| US3423737A | Nondestructive read transistor memory cell | Expired / Lapsed | 1965-06-21 | 1969-01-21 | 2 | Details |
| US3422313A | Protection means for sensing and preventing an overheated c… | Expired / Lapsed | 1966-01-19 | 1969-01-14 | 0 | Details |
| US3422402A | Memory systems for using storage devices containing defecti… | Expired / Lapsed | 1965-12-29 | 1969-01-14 | 0 | Details |
| US3422424A | Analog to digital converter | Expired / Lapsed | 1965-01-08 | 1969-01-14 | 0 | Details |
| US3421099A | Semiconductor push-pull circuits utilizing minority carrier… | Expired / Lapsed | 1966-03-25 | 1969-01-07 | 0 | Details |
| US3419956A | Technique for obtaining isolated integrated circuits | Expired / Lapsed | 1966-01-21 | 1969-01-07 | 0 | Details |
| US3420719A | Method of making semiconductors by laser induced diffusion | Expired / Lapsed | 1965-05-27 | 1969-01-07 | 0 | Details |
| US3418534A | Latching devices | Expired / Lapsed | — | 1968-12-24 | 0 | Details |
| US3418638A | Instruction processing unit for program branches | Expired / Lapsed | 1966-09-21 | 1968-12-24 | 2 | Details |
| US3417381A | Apparatus for writing information in memory by light | Expired / Lapsed | 1965-06-21 | 1968-12-17 | 2 | Details |
| US3415680A | Objects provided with protective coverings | Expired / Lapsed | 1965-12-20 | 1968-12-10 | 0 | Details |
| US3416132A | Group parity handling | Expired / Lapsed | 1965-04-05 | 1968-12-10 | 0 | Details |
| US3415950A | Video quantizing system | Expired / Lapsed | 1965-03-29 | 1968-12-10 | 2 | Details |
| US3416148A | Compound radius transducer head | Expired / Lapsed | 1964-12-23 | 1968-12-10 | 0 | Details |
| US3413610A | Display device with synchronized video and bcd data in a cy… | Expired / Lapsed | 1965-12-29 | 1968-11-26 | 0 | Details |
| US3413141A | Method and apparatus for making oriented magnetic recording… | Expired / Lapsed | 1965-09-02 | 1968-11-26 | 0 | Details |
| US3413464A | Method for measuring the nucleic acid in biological cells a… | Expired / Lapsed | 1965-04-29 | 1968-11-26 | 0 | Details |
| US3411947A | Indium oxide resistor composition, method, and article | Expired / Lapsed | 1964-06-29 | 1968-11-19 | 0 | Details |
| US3411122A | Electrical resistance element and method of fabricating | Expired / Lapsed | 1966-01-13 | 1968-11-12 | 0 | Details |
| US3411143A | Instruction address control by peripheral devices | Expired / Lapsed | 1966-01-13 | 1968-11-12 | 0 | Details |
| US3408631A | Record search system | Expired / Lapsed | 1966-03-28 | 1968-10-29 | 0 | Details |
| US3407781A | Combined indicator and order card form | Expired / Lapsed | 1966-02-04 | 1968-10-29 | 0 | Details |
| US3408458A | Line identifying and marking apparatus | Expired / Lapsed | 1964-12-02 | 1968-10-29 | 0 | Details |
| US3406633A | Collapsible chamber pump | Expired / Lapsed | 1966-11-07 | 1968-10-22 | 0 | Details |
| US3406366A | Electrical temperature sensor device | Expired / Lapsed | 1966-01-13 | 1968-10-15 | 0 | Details |
| US3406040A | Vapor deposition method for forming thin polymeric films | Expired / Lapsed | 1964-06-24 | 1968-10-15 | 0 | Details |
| US3405394A | Controlled register accessing | Expired / Lapsed | 1965-12-22 | 1968-10-08 | 0 | Details |
| US3405258A | Reliability test for computer check circuits | Expired / Lapsed | 1965-04-07 | 1968-10-08 | 0 | Details |
| US3405071A | Process of making microcapsules | Expired / Lapsed | 1963-12-30 | 1968-10-08 | 0 | Details |
| US3404392A | Magnetic track following servo system | Expired / Lapsed | 1967-04-14 | 1968-10-01 | 0 | Details |
| US3403955A | Radiant energy conductor with diffusing surface | Expired / Lapsed | 1964-11-24 | 1968-10-01 | 0 | Details |
| US3404230A | Frequency corrector for use in a data transmission system | Expired / Lapsed | 1964-07-24 | 1968-10-01 | 0 | Details |
| US3401589A | Method of controlling a testing apparatus through the use o… | Expired / Lapsed | 1964-12-23 | 1968-09-17 | 2 | Details |
| US3402001A | Selective gating of radiation | Expired / Lapsed | 1963-06-06 | 1968-09-17 | 1 | Details |
| US3401369A | Connector | Expired / Lapsed | 1966-06-07 | 1968-09-10 | 0 | Details |
| US3400377A | Character display system | Expired / Lapsed | 1965-10-13 | 1968-09-03 | 0 | Details |
| US3400376A | Information transfer control system | Expired / Lapsed | 1965-09-23 | 1968-09-03 | 0 | Details |
| US3400272A | Two dimensional scanner having back-to-back photodiodes | Expired / Lapsed | 1965-06-01 | 1968-09-03 | 0 | Details |
| US3400372A | Terminal for a multi-data processing system | Expired / Lapsed | 1965-02-16 | 1968-09-03 | 0 | Details |
| US3400273A | Two dimensional radiation scanner locating position by the … | Expired / Lapsed | 1964-09-02 | 1968-09-03 | 0 | Details |
| US3400371A | Data processing system | Expired / Lapsed | 1964-04-06 | 1968-09-03 | 0 | Details |
| US3398870A | Controlled air film bearing | Expired / Lapsed | 1967-01-23 | 1968-08-27 | 0 | Details |
| US3399384A | Variable priority access system | Expired / Lapsed | 1965-09-10 | 1968-08-27 | 0 | Details |
| US3399393A | Two-probe three-gap flux sensitive magnetic head | Expired / Lapsed | 1964-12-07 | 1968-08-27 | 0 | Details |
| US3398335A | Transistor structure with an emitter region epitaxially gro… | Expired / Lapsed | 1965-03-31 | 1968-08-20 | 0 | Details |
| US3398241A | Digital storage voice message generator | Expired / Lapsed | 1965-03-26 | 1968-08-20 | 0 | Details |
| US3396372A | Polling system | Expired / Lapsed | 1965-12-29 | 1968-08-06 | 0 | Details |
| US3394785A | Latch operated energy trap power transmission | Expired / Lapsed | 1966-04-26 | 1968-07-30 | 0 | Details |
| US3395392A | Expanded memory system | Expired / Lapsed | 1965-10-22 | 1968-07-30 | 0 | Details |
| US3395391A | Data transmission system and devices | Expired / Lapsed | 1965-08-23 | 1968-07-30 | 0 | Details |
| US3395287A | Optical orientation position sensor for multicontact miniat… | Expired / Lapsed | 1965-07-14 | 1968-07-30 | 2 | Details |
| US3394361A | Incremental magnetic recording and sensing system with twin… | Expired / Lapsed | 1964-04-30 | 1968-07-23 | 0 | Details |
| US3392442A | Solder method for providing standoff of device from substra… | Expired / Lapsed | 1965-06-24 | 1968-07-16 | 0 | Details |
| US3392368A | Ultrasonic and hypersonic sound generator | Expired / Lapsed | 1967-03-15 | 1968-07-09 | 0 | Details |
| US3391394A | Microprogram control for a data processing system | Expired / Lapsed | 1965-10-22 | 1968-07-02 | 0 | Details |
| US3390347A | Sample and hold circuit | Expired / Lapsed | 1966-01-10 | 1968-06-25 | 2 | Details |
| US3389023A | Methods of making a narrow emitter transistor by masking an… | Expired / Lapsed | 1966-01-14 | 1968-06-18 | 0 | Details |
| US3387283A | Addressing system | Expired / Lapsed | 1966-02-07 | 1968-06-04 | 2 | Details |
| US3387282A | Input for digital controller | Expired / Lapsed | 1966-01-17 | 1968-06-04 | 2 | Details |
| US3387222A | Adaptive threshold signal detector with noise suppression | Expired / Lapsed | 1965-07-01 | 1968-06-04 | 2 | Details |
| US3386865A | Process of making planar semiconductor devices isolated by … | Expired / Lapsed | 1965-05-10 | 1968-06-04 | 2 | Details |
| US3387262A | Diagnostic system | Expired / Lapsed | 1965-01-12 | 1968-06-04 | 0 | Details |
| US3387272A | Content addressable memory system using address transformat… | Expired / Lapsed | 1964-12-23 | 1968-06-04 | 0 | Details |
| US3386823A | Photothermic image producing process | Expired / Lapsed | 1964-06-01 | 1968-06-04 | 0 | Details |
| US3386864A | Semiconductor-metal-semiconductor structure | Expired / Lapsed | 1963-12-09 | 1968-06-04 | 0 | Details |
| US3387230A | Stress modulation of recombination radiation in semiconduct… | Expired / Lapsed | 1962-10-30 | 1968-06-04 | 2 | Details |
| US3386083A | Interruptions in a large scale data processing system | Expired / Lapsed | 1967-01-13 | 1968-05-28 | 0 | Details |
| US3386084A | Remote addressing in a data processing system | Expired / Lapsed | 1967-01-13 | 1968-05-28 | 0 | Details |
| US3386082A | Configuration control in multiprocessors | Expired / Lapsed | 1965-06-02 | 1968-05-28 | 0 | Details |
| US3384875A | Reference selection apparatus for cross correlation | Expired / Lapsed | 1965-09-27 | 1968-05-21 | 0 | Details |
| US3382963A | Printing apparatus with no-print feature | Expired / Lapsed | 1966-08-17 | 1968-05-14 | 0 | Details |
| US3383657A | Personnel security system having personally carried card wi… | Expired / Lapsed | 1965-05-28 | 1968-05-14 | 0 | Details |
| US3383526A | Current driver circuit utilizing transistors | Expired / Lapsed | 1964-12-17 | 1968-05-14 | 0 | Details |
| US3382338A | Pushbutton actuator for elastomeric switch | Expired / Lapsed | 1966-04-26 | 1968-05-07 | 0 | Details |
| US3381274A | Recognition systems | Expired / Lapsed | 1959-12-18 | 1968-04-30 | 2 | Details |
| US3380030A | Apparatus for mating different word length memories | Expired / Lapsed | 1965-07-29 | 1968-04-23 | 0 | Details |
| US3380025A | Microprogrammed addressing control system for a digital com… | Expired / Lapsed | 1964-12-04 | 1968-04-23 | 0 | Details |
| US3380070A | Electrostatic head | Expired / Lapsed | 1964-02-19 | 1968-04-23 | 0 | Details |
| US3377579A | Plural channel priority control | Expired / Lapsed | 1967-01-13 | 1968-04-09 | 0 | Details |
| US3377624A | Memory protection system | Expired / Lapsed | 1966-01-07 | 1968-04-09 | 2 | Details |
| US3377619A | Data multiplexing system | Expired / Lapsed | 1964-04-06 | 1968-04-09 | 2 | Details |
| US3375457A | Data acquisition amplifiers | Expired / Lapsed | 1965-01-22 | 1968-03-26 | 0 | Details |
| US3374472A | Storage cancellation and panel data key fetching in a data … | Expired / Lapsed | 1967-01-13 | 1968-03-19 | 0 | Details |
| US3374470A | Adaptive threshold circuits | Expired / Lapsed | 1965-10-19 | 1968-03-19 | 2 | Details |
| US3374466A | Data processing system | Expired / Lapsed | 1965-05-10 | 1968-03-19 | 0 | Details |
| US3374410A | Stepping motor positioning system including acceleration an… | Expired / Lapsed | 1965-01-06 | 1968-03-19 | 0 | Details |
| US3374111A | Method for depositing thin dielectric polymer films | Expired / Lapsed | 1964-06-30 | 1968-03-19 | 0 | Details |
| US3374110A | Conductive element, composition and method | Expired / Lapsed | 1964-05-27 | 1968-03-19 | 0 | Details |
| US3374461A | Physiological monitoring system | Expired / Lapsed | 1964-02-25 | 1968-03-19 | 0 | Details |
| US3373413A | Pliable magnetic recording disk with direct transducer cont… | Expired / Lapsed | 1963-10-30 | 1968-03-12 | 0 | Details |
| US3372268A | Pulse generator | Expired / Lapsed | 1965-10-01 | 1968-03-05 | 0 | Details |
| US3372378A | Input/output unit switch | Expired / Lapsed | 1964-04-27 | 1968-03-05 | 0 | Details |
| US3370347A | Method of making superconductor wires | Expired / Lapsed | 1966-05-26 | 1968-02-27 | 2 | Details |
| US3371321A | Tutorial system | Expired / Lapsed | 1965-04-15 | 1968-02-27 | 0 | Details |
| US3370973A | Activation of glass for electroless metal deposition of uni… | Expired / Lapsed | 1964-12-28 | 1968-02-27 | 2 | Details |
| US3369991A | Apparatus for cathode sputtering including a shielded rf el… | Expired / Lapsed | 1965-01-28 | 1968-02-20 | 4 | Details |
| US3369990A | Cathodic sputtering apparatus including thermionic means fo… | Expired / Lapsed | 1964-12-31 | 1968-02-20 | 2 | Details |
| US3369129A | Current limiter employing field effect devices | Expired / Lapsed | 1966-03-29 | 1968-02-13 | 0 | Details |
| US3368207A | File protection to i/o storage | Expired / Lapsed | 1965-05-12 | 1968-02-06 | 0 | Details |
| US3366916A | Connector with fluid pressure relief devices | Expired / Lapsed | 1966-07-15 | 1968-01-30 | 1 | Details |
| US3366930A | Method and apparatus for rejecting noise in a data transmis… | Expired / Lapsed | 1965-03-01 | 1968-01-30 | 2 | Details |
| US3366929A | Computing system embodying flexible subroutine capabilities | Expired / Lapsed | 1964-12-30 | 1968-01-30 | 0 | Details |
| US3366927A | Computing techniques | Expired / Lapsed | 1964-06-17 | 1968-01-30 | 2 | Details |
| US3365631A | Semiconductor-ferroelectric dielectrics | Expired / Lapsed | 1965-07-14 | 1968-01-23 | 4 | Details |
| US3365583A | Electric field-responsive solid state devices | Expired / Lapsed | 1964-06-12 | 1968-01-23 | 2 | Details |
| US3363333A | Teaching machine | Expired / Lapsed | 1965-09-24 | 1968-01-16 | 0 | Details |
| US3364468A | Cryogenic fault or error-detecting and correcting system ha… | Expired / Lapsed | 1959-12-30 | 1968-01-16 | 2 | Details |
| US3364467A | Cryogenic fault or error-detection and correction device ha… | Expired / Lapsed | 1959-12-30 | 1968-01-16 | 2 | Details |
| US3363183A | Self-correcting clock for a data transmission system | Expired / Lapsed | 1965-07-13 | 1968-01-09 | 0 | Details |
| US3362015A | Communication switching adapter | Expired / Lapsed | 1964-06-30 | 1968-01-02 | 0 | Details |
| US3359921A | Print hammer unit for high speed printers | Expired / Lapsed | 1965-07-19 | 1967-12-26 | 2 | Details |
| US3359851A | Two color multiple beam interferometer for measuring small … | Expired / Lapsed | 1964-04-29 | 1967-12-26 | 2 | Details |
| US3359543A | Data transmission system | Expired / Lapsed | 1965-07-02 | 1967-12-19 | 2 | Details |
| US3358271A | Adaptive logic system for arbitrary functions | Expired / Lapsed | 1964-12-24 | 1967-12-12 | 2 | Details |
| US3357003A | Single channel quaternary magnetic recording system | Expired / Lapsed | 1964-12-28 | 1967-12-05 | 1 | Details |
| US3355674A | Optical fiber laser device | Expired / Lapsed | 1962-06-27 | 1967-11-28 | 2 | Details |
| US3354430A | Memory control matrix | Expired / Lapsed | 1965-06-30 | 1967-11-21 | 2 | Details |
| US3354440A | Nondestructive memory array | Expired / Lapsed | 1965-04-19 | 1967-11-21 | 2 | Details |
| US3354450A | Data translation apparatus | Expired / Lapsed | 1964-06-23 | 1967-11-21 | 2 | Details |
| US3353894A | Electro-optic light deflector utilizing total internal refl… | Expired / Lapsed | 1964-06-08 | 1967-11-21 | 1 | Details |
| US3354405A | Energy coupling device | Expired / Lapsed | 1962-08-24 | 1967-11-21 | 2 | Details |
| US3353162A | Communication line priority servicing apparatus | Expired / Lapsed | 1965-06-29 | 1967-11-14 | 2 | Details |
| US3353160A | Tree priority circuit | Expired / Lapsed | 1965-06-09 | 1967-11-14 | 2 | Details |
| US3353157A | Generator for variable and repetitive sequences of digital … | Expired / Lapsed | 1964-09-28 | 1967-11-14 | 2 | Details |
| US3351698A | Heat sink mounting for semiconductor devices | Expired / Lapsed | 1964-11-13 | 1967-11-07 | 2 | Details |
| US3350518A | Reader for punched record | Expired / Lapsed | 1966-02-11 | 1967-10-31 | 2 | Details |
| US3350695A | Information retrieval system and method | Expired / Lapsed | 1964-12-08 | 1967-10-31 | 2 | Details |
| US3350690A | Automatic data correction for batchfabricated memories | Expired / Lapsed | 1964-02-25 | 1967-10-31 | 2 | Details |
| US3350222A | Hermetic seal for planar transistors and method | Expired / Lapsed | 1963-12-26 | 1967-10-31 | 2 | Details |
| US3349375A | Associative logic for highly parallel computer and data pro… | Expired / Lapsed | 1963-11-07 | 1967-10-24 | 2 | Details |
| US3348214A | Adaptive sequential logic network | Expired / Lapsed | 1965-06-28 | 1967-10-17 | 2 | Details |
| US3348153A | Frequency-shift receiver insensitive to distortion and sele… | Expired / Lapsed | 1964-02-17 | 1967-10-17 | 2 | Details |
| US3346090A | Ribbon feed mechanism | Expired / Lapsed | 1966-02-11 | 1967-10-10 | 2 | Details |
| US3345912A | Rotary shearing interferometer | Expired / Lapsed | 1964-03-10 | 1967-10-10 | 2 | Details |
| US3344410A | Data handling system | Expired / Lapsed | 1965-04-28 | 1967-09-26 | 2 | Details |
| US3343256A | Methods of making thru-connections in semiconductor wafers | Expired / Lapsed | 1964-12-28 | 1967-09-26 | 2 | Details |
| US3344406A | Sampled data reduction and storage system | Expired / Lapsed | 1964-11-09 | 1967-09-26 | 2 | Details |
| US3344403A | File selection system | Expired / Lapsed | 1964-06-26 | 1967-09-26 | 2 | Details |
| US3343141A | Bypassing of processor sequence controls for diagnostic tes… | Expired / Lapsed | 1964-12-23 | 1967-09-19 | 2 | Details |
| US3343135A | Compiling circuitry for a highly-parallel computing system | Expired / Lapsed | 1964-08-13 | 1967-09-19 | 2 | Details |
| US3342632A | Magnetic coating | Expired / Lapsed | 1964-08-05 | 1967-09-19 | 2 | Details |
| US3342652A | Chemical polishing of a semi-conductor substrate | Expired / Lapsed | 1964-04-02 | 1967-09-19 | 2 | Details |
| US3341442A | Method of cathode sputtering including cleaning by ion bomb… | Expired / Lapsed | 1966-08-22 | 1967-09-12 | 2 | Details |
| US3341824A | Unit unavailability detector for a data processing system | Expired / Lapsed | 1965-04-05 | 1967-09-12 | 2 | Details |
| US3341818A | Plural line scanner | Expired / Lapsed | 1964-06-30 | 1967-09-12 | 2 | Details |
| US3340388A | Latched carry save adder circuit for multipliers | Expired / Lapsed | 1965-07-12 | 1967-09-05 | 2 | Details |
| US3340515A | Data buffering for time related measured data transmitted a… | Expired / Lapsed | 1964-11-17 | 1967-09-05 | 2 | Details |
| US3339179A | Pattern recognition preprocessing techniques | Expired / Lapsed | 1966-02-23 | 1967-08-29 | 2 | Details |
| US3339073A | Sonic laser modulator with mode suppression produced by ext… | Expired / Lapsed | 1962-12-31 | 1967-08-29 | 2 | Details |
| US3337860A | Display tracking system | Expired / Lapsed | 1964-12-31 | 1967-08-22 | 2 | Details |
| US3337855A | Transmission control unit | Expired / Lapsed | 1964-06-30 | 1967-08-22 | 2 | Details |
| US3337766A | Selective beam positioning of a flying spot scanner with er… | Expired / Lapsed | 1964-04-16 | 1967-08-22 | 2 | Details |
| US3337365A | Electrical resistance composition and method of using the s… | Expired / Lapsed | 1963-03-25 | 1967-08-22 | 2 | Details |
| US3336582A | Interlocked communication system | Expired / Lapsed | 1964-09-01 | 1967-08-15 | 2 | Details |
| US3336467A | Simultaneous message framing and error detection | Expired / Lapsed | 1963-11-29 | 1967-08-15 | 2 | Details |
| US3335340A | Combined transistor and testing structures and fabrication … | Expired / Lapsed | 1964-02-24 | 1967-08-08 | 2 | Details |
| US3334304A | Asynchronous character generator for successive endpoint de… | Expired / Lapsed | 1965-03-01 | 1967-08-01 | 0 | Details |
| US3333251A | File storage system | Expired / Lapsed | 1964-11-13 | 1967-07-25 | 2 | Details |
| US3333246A | Delay line clock | Expired / Lapsed | 1964-07-08 | 1967-07-25 | 2 | Details |
| US3333249A | Adaptive logic system with random selection, for conditioni… | Expired / Lapsed | 1964-06-29 | 1967-07-25 | 2 | Details |
| US3333146A | Opto-electronic device | Expired / Lapsed | 1964-06-29 | 1967-07-25 | 2 | Details |
| US3333248A | Self-adaptive systems | Expired / Lapsed | 1963-12-20 | 1967-07-25 | 2 | Details |
| US3332068A | System for transferring data to a number of terminals | Expired / Lapsed | 1963-08-23 | 1967-07-18 | 1 | Details |
| US3331061A | Drive-sense arrangement for data storage unit | Expired / Lapsed | 1963-11-27 | 1967-07-11 | 1 | Details |
| US3331053A | Format control for disk recording | Expired / Lapsed | 1963-10-01 | 1967-07-11 | 2 | Details |
| US3329474A | Digital light deflector utilizing co-planar polarization ro… | Expired / Lapsed | 1963-11-08 | 1967-07-04 | 2 | Details |
| US3328195A | Magnetic recording medium with two storage layers for recor… | Expired / Lapsed | 1966-06-24 | 1967-06-27 | 2 | Details |
| US3327916A | Vacuum controlled air film | Expired / Lapsed | 1965-06-14 | 1967-06-27 | 2 | Details |
| US3328772A | Data queuing system with use of recirculating delay line | Expired / Lapsed | 1964-12-23 | 1967-06-27 | 2 | Details |
| US3328523A | Scanning apparatus | Expired / Lapsed | 1964-07-24 | 1967-06-27 | 2 | Details |
| US3328770A | Address register | Expired / Lapsed | 1964-06-26 | 1967-06-27 | 2 | Details |
| US3328768A | Storage protection systems | Expired / Lapsed | 1964-04-06 | 1967-06-27 | 1 | Details |
| US3328765A | Memory protection system | Expired / Lapsed | 1963-12-31 | 1967-06-27 | 2 | Details |
| US3325882A | Method for forming electrical connections to a solid state … | Expired / Lapsed | 1965-06-23 | 1967-06-20 | 2 | Details |
| US3327119A | Method and apparatus for detecting cancer cells | Expired / Lapsed | 1964-03-26 | 1967-06-20 | 2 | Details |
| US3327117A | Cancer cell detector using two wavelengths for comparison | Expired / Lapsed | 1963-08-12 | 1967-06-20 | 2 | Details |
| US3327131A | Current control system | Expired / Lapsed | 1961-12-29 | 1967-06-20 | 2 | Details |
| US3325788A | Extrinsically variable microprogram controls | Expired / Lapsed | 1964-12-21 | 1967-06-13 | 2 | Details |
| US3323119A | Display system for a data processing unit | Expired / Lapsed | 1963-12-30 | 1967-05-30 | 2 | Details |
| US3323108A | Symbolic addressing | Expired / Lapsed | 1963-06-12 | 1967-05-30 | 2 | Details |
| US3319317A | Method of making a multilayered laminated circuit board | Expired / Lapsed | 1963-12-23 | 1967-05-16 | 0 | Details |
| US3319230A | Data processing machine including program interrupt feature | Expired / Lapsed | 1965-01-05 | 1967-05-09 | 2 | Details |
| US3317902A | Address selection control apparatus | Expired / Lapsed | 1964-04-06 | 1967-05-02 | 2 | Details |
| US3317901A | Adaptive logic system with inputs applied randomly only dur… | Expired / Lapsed | 1964-02-05 | 1967-05-02 | 2 | Details |
| US3317848A | Non-reciprocal light amplifier | Expired / Lapsed | 1964-01-20 | 1967-05-02 | 2 | Details |
| US3317900A | Adaptive logic system | Expired / Lapsed | 1963-12-23 | 1967-05-02 | 1 | Details |
| US3317899A | Information processing system utilizing a key to address tr… | Expired / Lapsed | 1963-10-23 | 1967-05-02 | 2 | Details |
| US3317898A | Memory system | Expired / Lapsed | 1963-07-19 | 1967-05-02 | 2 | Details |
| US3317266A | Electrochromic light valve | Expired / Lapsed | 1963-05-16 | 1967-05-02 | 2 | Details |
| US3317733A | Radiation scanner employing rectifying devices and photocon… | Expired / Lapsed | 1963-05-10 | 1967-05-02 | 2 | Details |
| US3315235A | Data processing system | Expired / Lapsed | 1964-08-04 | 1967-04-18 | 2 | Details |
| US3315229A | Blood cell recognizer | Expired / Lapsed | 1963-12-31 | 1967-04-18 | 2 | Details |
| US3315233A | Self-addressing and self-assigning memory system | Expired / Lapsed | 1963-10-01 | 1967-04-18 | 2 | Details |
| US3314052A | Light modulation system | Expired / Lapsed | 1963-04-12 | 1967-04-11 | 2 | Details |
| US3313663A | Intermetallic semiconductor body and method of diffusing an… | Expired / Lapsed | 1963-03-28 | 1967-04-11 | 2 | Details |
| US3312871A | Interconnection arrangement for integrated circuits | Expired / Lapsed | 1964-12-23 | 1967-04-04 | 2 | Details |
| US3312948A | Record format control circuit | Expired / Lapsed | 1964-03-25 | 1967-04-04 | 2 | Details |
| US3312946A | Processor for coded data | Expired / Lapsed | 1963-12-18 | 1967-04-04 | 2 | Details |
| US3312881A | Transistor with limited area basecollector junction | Expired / Lapsed | 1963-11-08 | 1967-04-04 | 2 | Details |
| US3311842A | Digital transducer with condition responsive shock excited … | Expired / Lapsed | 1965-01-19 | 1967-03-28 | 1 | Details |
| US3311896A | Data shifting apparatus | Expired / Lapsed | 1964-04-03 | 1967-03-28 | 2 | Details |
| US3311895A | Adaptive logic system with artificial weighting of output s… | Expired / Lapsed | 1963-12-30 | 1967-03-28 | 2 | Details |
| US3311891A | Recirculating memory device with gated inputs | Expired / Lapsed | 1963-08-21 | 1967-03-28 | 2 | Details |
| US3311887A | File memory system with key to address transformation appar… | Expired / Lapsed | 1963-04-12 | 1967-03-28 | 2 | Details |
| US3311739A | Accumulative multiplier | Expired / Lapsed | 1963-01-10 | 1967-03-28 | 2 | Details |
| US3310786A | Data compression/expansion and compressed data processing | Expired / Lapsed | 1964-06-30 | 1967-03-21 | 2 | Details |
| US3310780A | Character assembly and distribution apparatus | Expired / Lapsed | 1962-10-15 | 1967-03-21 | 2 | Details |
| US3308977A | Automatic tray handler | Expired / Lapsed | 1965-10-04 | 1967-03-14 | 2 | Details |
| US3308444A | Thermoplastic recording system | Expired / Lapsed | 1964-04-27 | 1967-03-07 | 1 | Details |
| US3308431A | Distortion correction circuitry for data transmission syste… | Expired / Lapsed | 1963-09-30 | 1967-03-07 | 2 | Details |
| US3307897A | Light modulator | Expired / Lapsed | 1963-07-01 | 1967-03-07 | 0 | Details |
| US3308395A | Lasers | Expired / Lapsed | 1961-10-10 | 1967-03-07 | 2 | Details |
| US3304544A | Random access magnetic memory unit housing | Expired / Lapsed | 1962-12-27 | 1967-02-14 | 2 | Details |
| US3303116A | Process for cathodically sputtering magnetic thin films | Expired / Lapsed | 1964-10-09 | 1967-02-07 | 2 | Details |
| US3302562A | Means to prevent excessive frictional loading in a wire pri… | Expired / Lapsed | 1964-06-29 | 1967-02-07 | 2 | Details |
| US3303059A | Methods of improving electrical characteristics of semicond… | Expired / Lapsed | 1964-06-29 | 1967-02-07 | 2 | Details |
| US3303476A | Input/output control | Expired / Lapsed | 1964-04-06 | 1967-02-07 | 2 | Details |
| US3303431A | Coupled semiconductor injection laser devices | Expired / Lapsed | 1964-02-10 | 1967-02-07 | 2 | Details |
| US3303399A | Glasses for encapsulating semiconductor devices and resulta… | Expired / Lapsed | 1964-01-30 | 1967-02-07 | 2 | Details |
| US3303046A | Method for making liquid-filled porous plastics and products | Expired / Lapsed | 1963-12-30 | 1967-02-07 | 2 | Details |
| US3303393A | Terminals for microminiaturized devices and methods of conn… | Expired / Lapsed | 1963-12-27 | 1967-02-07 | 2 | Details |
| US3303475A | Control system | Expired / Lapsed | 1963-11-29 | 1967-02-07 | 2 | Details |
| US3303473A | Adaptive logic circuits | Expired / Lapsed | 1963-10-28 | 1967-02-07 | 2 | Details |
| FR1468426A | High energy ray machining and coating process | Expired / Lapsed | 1966-02-17 | 1967-02-03 | 0 | Details |
| US3302186A | Information retrieval system | Expired / Lapsed | 1964-08-17 | 1967-01-31 | 2 | Details |
| US3302170A | Traffic light control buffer | Expired / Lapsed | 1964-04-28 | 1967-01-31 | 2 | Details |
| US3302109A | Apparatus and method for testing logic circuits and the lik… | Expired / Lapsed | 1962-12-12 | 1967-01-31 | 2 | Details |
| US3302176A | Message routing system | Expired / Lapsed | 1962-12-07 | 1967-01-31 | 2 | Details |
| US3300763A | Message exchange system utilizing time multiplexing and a p… | Expired / Lapsed | 1963-08-20 | 1967-01-24 | 2 | Details |
| US3300339A | Method of covering the surfaces of objects with protective … | Expired / Lapsed | 1962-12-31 | 1967-01-24 | 1 | Details |
| US3299410A | Data filing system | Expired / Lapsed | 1964-03-25 | 1967-01-17 | 2 | Details |
| US3299261A | Multiple-input memory accessing apparatus | Expired / Lapsed | 1963-12-16 | 1967-01-17 | 2 | Details |
| US3299210A | Apparatus for connecting a multichannel data processor with… | Expired / Lapsed | 1963-03-18 | 1967-01-17 | 4 | Details |
| US3297465A | Method for producing organic plasma and for depositing poly… | Expired / Lapsed | 1963-12-31 | 1967-01-10 | 2 | Details |
| US3297993A | Apparatus for generating information regarding the spatial … | Expired / Lapsed | 1963-12-19 | 1967-01-10 | 1 | Details |
| US3297875A | Optical traveling wave parametric devices | Expired / Lapsed | 1962-06-28 | 1967-01-10 | 2 | Details |
| US3294956A | Magnetic ledger card machine | Expired / Lapsed | 1962-12-28 | 1966-12-27 | 1 | Details |
| US3293092A | Semiconductor device fabrication | Expired / Lapsed | 1964-03-17 | 1966-12-20 | 2 | Details |
| US3293652A | Selective piercing of sheet material | Expired / Lapsed | 1964-02-20 | 1966-12-20 | 1 | Details |
| US3292240A | Method of fabricating microminiature functional components | Expired / Lapsed | 1963-08-08 | 1966-12-20 | 2 | Details |
| US3293616A | Computer instruction sequencing and control system | Expired / Lapsed | 1963-07-03 | 1966-12-20 | 2 | Details |
| US3293615A | Current addressing system | Expired / Lapsed | 1963-06-03 | 1966-12-20 | 2 | Details |
| US3292151A | Memory expansion | Expired / Lapsed | 1962-06-04 | 1966-12-13 | 2 | Details |
| US3290656A | Associative memory for subroutines | Expired / Lapsed | 1963-06-28 | 1966-12-06 | 2 | Details |
| US3290671A | Byte decoder | Expired / Lapsed | 1963-04-29 | 1966-12-06 | 2 | Details |
| US3289083A | Frequency shift keyed data transmission system | Expired / Lapsed | 1963-05-28 | 1966-11-29 | 2 | Details |
| US3289175A | Computer data storage system | Expired / Lapsed | 1963-05-23 | 1966-11-29 | 2 | Details |
| US3289171A | Push-down list storage using delay line | Expired / Lapsed | 1962-12-03 | 1966-11-29 | 2 | Details |
| US3289168A | Interrupt control system | Expired / Lapsed | 1962-07-31 | 1966-11-29 | 2 | Details |
| US3286240A | Channel status checking and switching system | Expired / Lapsed | 1962-12-31 | 1966-11-15 | 1 | Details |
| US3286083A | Information storage system | Expired / Lapsed | 1962-04-16 | 1966-11-15 | 2 | Details |
| US3286243A | Shift register deskewing system | Expired / Lapsed | 1962-03-02 | 1966-11-15 | 2 | Details |
| US3284780A | Adaptive logic system | Expired / Lapsed | 1963-12-19 | 1966-11-08 | 4 | Details |
| US3283124A | Selective heating apparatus | Expired / Lapsed | 1965-05-07 | 1966-11-01 | 2 | Details |
| US3283160A | Photoelectronic semiconductor devices comprising an injecti… | Expired / Lapsed | 1963-11-26 | 1966-11-01 | 1 | Details |
| US3282816A | Process of cathode sputtering from a cylindrical cathode | Expired / Lapsed | 1963-09-16 | 1966-11-01 | 2 | Details |
| US3282815A | Magnetic control of film deposition | Expired / Lapsed | 1963-07-01 | 1966-11-01 | 2 | Details |
| US3281793A | Selective modification of sequentially scanned control word… | Expired / Lapsed | 1962-10-15 | 1966-10-25 | 2 | Details |
| US3279945A | Method for dampening vibrations in ferrite cores and produc… | Expired / Lapsed | 1963-06-28 | 1966-10-18 | 2 | Details |
| US3280312A | System for measuring kiln conditions using thermocouples in… | Expired / Lapsed | 1962-12-11 | 1966-10-18 | 2 | Details |
| US3277588A | Instruction terminal | Expired / Lapsed | 1964-08-20 | 1966-10-11 | 2 | Details |
| US3278732A | High speed multiplier circuit | Expired / Lapsed | 1963-10-29 | 1966-10-11 | 1 | Details |
| US3278685A | Wave analyzing system | Expired / Lapsed | 1962-12-31 | 1966-10-11 | 2 | Details |
| US3277447A | Electronic digital computers | Expired / Lapsed | 1964-03-18 | 1966-10-04 | 2 | Details |
| US3275995A | Data handling system | Expired / Lapsed | 1963-12-23 | 1966-09-27 | 2 | Details |
| US3274611A | Binary to ternary code conversion recording system | Expired / Lapsed | 1963-12-27 | 1966-09-20 | 2 | Details |
| US3274560A | Message handling system | Expired / Lapsed | 1962-09-12 | 1966-09-20 | 2 | Details |
| US3274556A | Large scale shifter | Expired / Lapsed | 1962-07-10 | 1966-09-20 | 2 | Details |
| US3274378A | Data transfer and conversion circuit | Expired / Lapsed | 1961-12-28 | 1966-09-20 | 2 | Details |
| US3273131A | Queue reducing memory | Expired / Lapsed | 1963-12-31 | 1966-09-13 | 2 | Details |
| US3273130A | Applied sequence identification device | Expired / Lapsed | 1963-12-04 | 1966-09-13 | 2 | Details |
| US3273129A | Computer data storage and handling system having means for … | Expired / Lapsed | 1963-07-05 | 1966-09-13 | 2 | Details |
| US3273126A | Computer control system | Expired / Lapsed | 1961-08-25 | 1966-09-13 | 2 | Details |
| US3271751A | Magnetic thin film transducer | Expired / Lapsed | 1962-12-03 | 1966-09-06 | 2 | Details |
| US3270850A | Recording device | Expired / Lapsed | 1961-08-29 | 1966-09-06 | 2 | Details |
| US3270325A | Parallel memory, multiple processing, variable word length … | Expired / Lapsed | 1963-12-23 | 1966-08-30 | 2 | Details |
| US3270324A | Means of address distribution | Expired / Lapsed | 1963-01-07 | 1966-08-30 | 2 | Details |
| US3268653A | Printed circuit board with solder resistant coating in the … | Expired / Lapsed | 1964-04-29 | 1966-08-23 | 2 | Details |
| US3268875A | Translation operation | Expired / Lapsed | 1963-12-20 | 1966-08-23 | 2 | Details |
| US3268816A | Adaptive communications system incorporating receiver selec… | Expired / Lapsed | 1963-11-22 | 1966-08-23 | 2 | Details |
| US3266127A | Method of forming contacts on semiconductors | Expired / Lapsed | 1964-01-27 | 1966-08-16 | 2 | Details |
| US3267431A | Adaptive computing system capable of being trained to recog… | Expired / Lapsed | 1963-04-29 | 1966-08-16 | 2 | Details |
| US3267439A | Pattern recognition and prediction system | Expired / Lapsed | 1963-04-26 | 1966-08-16 | 2 | Details |
| US3265975A | Delay line controlled pulse generator | Expired / Lapsed | 1963-12-19 | 1966-08-09 | 2 | Details |
| US3266024A | Synchronizing apparatus | Expired / Lapsed | 1962-05-31 | 1966-08-09 | 2 | Details |
| US3264611A | Optical multiplexing | Expired / Lapsed | 1964-03-09 | 1966-08-02 | 1 | Details |
| US3264615A | Memory protection system | Expired / Lapsed | 1962-12-11 | 1966-08-02 | 2 | Details |
| US3263216A | Pattern recognition error correction system employing varia… | Expired / Lapsed | 1964-03-20 | 1966-07-26 | 2 | Details |
| US3262122A | Thermoplastic memory | Expired / Lapsed | 1963-05-01 | 1966-07-19 | 2 | Details |
| US3261916A | Adjustable recognition system | Expired / Lapsed | 1962-11-16 | 1966-07-19 | 2 | Details |
| US3262059A | Amplifier or generator of optical-mode waves in solids | Expired / Lapsed | 1962-08-29 | 1966-07-19 | 2 | Details |
| US3261082A | Method of tailoring thin film impedance devices | Expired / Lapsed | 1962-03-27 | 1966-07-19 | 2 | Details |
| US3260982A | Flat cable strain relief | Expired / Lapsed | 1963-12-31 | 1966-07-12 | 2 | Details |
| US3261000A | Associative memory logical connectives | Expired / Lapsed | 1961-12-22 | 1966-07-12 | 2 | Details |
| US3256516A | Data display centering and expansion system | Expired / Lapsed | 1962-06-20 | 1966-06-14 | 2 | Details |
| US3255033A | Electroless plating of a substrate with nickel-iron alloys … | Expired / Lapsed | 1961-12-28 | 1966-06-07 | 2 | Details |
| US3253265A | Associative memory ordered retrieval | Expired / Lapsed | 1961-12-29 | 1966-05-24 | 2 | Details |
| US3253264A | Associative memory ordered retrieval | Expired / Lapsed | 1961-12-29 | 1966-05-24 | 1 | Details |
| US3253131A | Adder | Expired / Lapsed | 1961-06-30 | 1966-05-24 | 2 | Details |
| US3253263A | Code to voice inquiry system and twospeed multi-unit buffer… | Expired / Lapsed | 1961-04-10 | 1966-05-24 | 2 | Details |
| US3252004A | Multistate memory circuit | Expired / Lapsed | 1962-11-28 | 1966-05-17 | 1 | Details |
| US3252097A | Marginal checking system | Expired / Lapsed | 1962-10-29 | 1966-05-17 | 2 | Details |
| US3252098A | Waveform shaping circuit | Expired / Lapsed | 1961-11-20 | 1966-05-17 | 2 | Details |
| US3250694A | Apparatus for coating articles by cathode sputtering | Expired / Lapsed | 1962-10-17 | 1966-05-10 | 4 | Details |
| US3249924A | Asynchronous data processing system | Expired / Lapsed | 1962-12-31 | 1966-05-03 | 2 | Details |
| US3249921A | Associative memory ordered retrieval | Expired / Lapsed | 1961-12-29 | 1966-05-03 | 2 | Details |
| US3249920A | Program control element | Expired / Lapsed | 1960-06-30 | 1966-05-03 | 2 | Details |
| US3248671A | Lasers utilizing internal reflection techniques | Expired / Lapsed | 1962-11-30 | 1966-04-26 | 0 | Details |
| US3248697A | Error classification and correction system | Expired / Lapsed | 1962-11-27 | 1966-04-26 | 1 | Details |
| US3248669A | Semiconductor laser with optical cavity | Expired / Lapsed | 1962-10-30 | 1966-04-26 | 0 | Details |
| US3248708A | Memory organization for fast read storage | Expired / Lapsed | 1962-01-22 | 1966-04-26 | 2 | Details |
| US3248677A | Temperature compensated semiconductor resistor | Expired / Lapsed | 1961-10-27 | 1966-04-26 | 2 | Details |
| US3248705A | Automatic editor | Expired / Lapsed | 1961-06-30 | 1966-04-26 | 2 | Details |
| US3248702A | Electronic digital computing machines | Expired / Lapsed | 1961-03-13 | 1966-04-26 | 2 | Details |
| US3248030A | Moving record control | Expired / Lapsed | 1961-01-18 | 1966-04-26 | 0 | Details |
| US3248701A | Data transfer control system | Expired / Lapsed | 1960-12-30 | 1966-04-26 | 2 | Details |
| US3247489A | Memory device including function performing means | Expired / Lapsed | 1961-08-31 | 1966-04-19 | 2 | Details |
| US3246305A | Message distribution system | Expired / Lapsed | 1962-10-31 | 1966-04-12 | 2 | Details |
| US3246299A | Data processing system | Expired / Lapsed | 1961-01-09 | 1966-04-12 | 1 | Details |
| US3244369A | Input-output conversion apparatus | Expired / Lapsed | 1964-09-25 | 1966-04-05 | 2 | Details |
| US3244986A | Detection of bi-phase digital signals | Expired / Lapsed | 1962-10-08 | 1966-04-05 | 2 | Details |
| US3245047A | Selective data transfer apparatus | Expired / Lapsed | 1962-09-19 | 1966-04-05 | 2 | Details |
| US3245045A | Integrated data processing system | Expired / Lapsed | 1961-11-21 | 1966-04-05 | 2 | Details |
| US3245044A | Automatic program suspension system | Expired / Lapsed | 1961-11-16 | 1966-04-05 | 1 | Details |
| US3245043A | Message communication systems with interstation information… | Expired / Lapsed | 1961-11-10 | 1966-04-05 | 2 | Details |
| US3245038A | Central to remote communication system with address modific… | Expired / Lapsed | 1961-06-30 | 1966-04-05 | 2 | Details |
| US3244805A | Counter controlled remote station transmission to central d… | Expired / Lapsed | 1961-06-29 | 1966-04-05 | 2 | Details |
| US3245042A | Computer indexing apparatus | Expired / Lapsed | 1960-10-26 | 1966-04-05 | 2 | Details |
| US3242262A | Method and apparatus for transmitting binary data | Expired / Lapsed | 1961-09-21 | 1966-03-22 | 2 | Details |
| US3242467A | Temporary storage register | Expired / Lapsed | 1960-06-07 | 1966-03-22 | 2 | Details |
| US3241015A | Positional servo system | Expired / Lapsed | 1961-12-26 | 1966-03-15 | 2 | Details |
| US3239393A | Method for producing semiconductor articles | Expired / Lapsed | 1962-12-31 | 1966-03-08 | 2 | Details |
| US3239811A | Weighting and decision circuit for use in specimen recognit… | Expired / Lapsed | 1962-07-11 | 1966-03-08 | 1 | Details |
| US3239823A | Twin gap flux responsive head | Expired / Lapsed | 1962-05-16 | 1966-03-08 | 2 | Details |
| US3239818A | Memory system | Expired / Lapsed | 1961-12-28 | 1966-03-08 | 2 | Details |
| US3238303A | Wave analyzing system | Expired / Lapsed | 1962-09-11 | 1966-03-01 | 2 | Details |
| US3238510A | Memory organization for data processors | Expired / Lapsed | 1961-12-29 | 1966-03-01 | 2 | Details |
| US3238508A | Logical manipulator | Expired / Lapsed | 1961-12-18 | 1966-03-01 | 2 | Details |
| US3238377A | Cryogenic m out of n logic circuits | Expired / Lapsed | 1961-12-04 | 1966-03-01 | 2 | Details |
| US3238506A | Computer multiplexing apparatus | Expired / Lapsed | 1961-06-27 | 1966-03-01 | 2 | Details |
| US3237025A | Comparator circuit | Expired / Lapsed | 1962-12-28 | 1966-02-22 | 2 | Details |
| US3236351A | High speed matrix printer | Expired / Lapsed | 1961-12-05 | 1966-02-22 | 0 | Details |
| US3237157A | Apparatus for detecting and localizing malfunctions in elec… | Expired / Lapsed | 1960-12-30 | 1966-02-22 | 2 | Details |
| US3235842A | Serially connected inhibitor logic stages with means for by… | Expired / Lapsed | 1960-07-29 | 1966-02-15 | 2 | Details |
| US3234440A | Semiconductor device fabrication | Expired / Lapsed | 1962-08-14 | 1966-02-08 | 2 | Details |
| US3234058A | Method of forming an integral masking fixture by epitaxial … | Expired / Lapsed | 1962-06-27 | 1966-02-08 | 2 | Details |
| US3234524A | Push-down memory | Expired / Lapsed | 1962-05-28 | 1966-02-08 | 2 | Details |
| US3234522A | Inference unit | Expired / Lapsed | 1961-12-20 | 1966-02-08 | 2 | Details |
| US3234057A | Semiconductor heterojunction device | Expired / Lapsed | 1961-06-23 | 1966-02-08 | 2 | Details |
| US3234392A | Photosensitive pattern recognition systems | Expired / Lapsed | 1961-05-26 | 1966-02-08 | 1 | Details |
| US3232164A | Optical system for detecting and measuring angular movements | Expired / Lapsed | 1961-05-24 | 1966-02-01 | 2 | Details |
| US3231863A | Memory bus control unit | Expired / Lapsed | 1960-12-30 | 1966-01-25 | 2 | Details |
| US3231862A | Memory bus control unit | Expired / Lapsed | 1960-12-30 | 1966-01-25 | 2 | Details |
| US3230338A | Selective heating apparatus | Expired / Lapsed | 1962-07-02 | 1966-01-18 | 2 | Details |
| US3230509A | Multiple circuit data transmission control | Expired / Lapsed | 1962-06-11 | 1966-01-18 | 2 | Details |
| US3230513A | Memory addressing system | Expired / Lapsed | 1960-12-30 | 1966-01-18 | 2 | Details |
| US3230512A | Memory system | Expired / Lapsed | 1959-08-28 | 1966-01-18 | 2 | Details |
| US3229095A | Apparatus for obtaining the difference of two incident opti… | Expired / Lapsed | 1963-05-20 | 1966-01-11 | 2 | Details |
| US3229104A | Four terminal electro-optical semiconductor device using li… | Expired / Lapsed | 1962-12-24 | 1966-01-11 | 2 | Details |
| US3229209A | Vestigial sideband transmission system | Expired / Lapsed | 1962-12-18 | 1966-01-11 | 2 | Details |
| US3229078A | Code converter | Expired / Lapsed | 1962-06-29 | 1966-01-11 | 2 | Details |
| US3229260A | Multiprocessing computer system | Expired / Lapsed | 1962-03-02 | 1966-01-11 | 2 | Details |
| US3229259A | Multiple rate data system | Expired / Lapsed | 1962-02-01 | 1966-01-11 | 2 | Details |
| US3229272A | Analog to digital time base encoder | Expired / Lapsed | 1961-12-29 | 1966-01-11 | 2 | Details |
| US3229255A | Memory system | Expired / Lapsed | 1959-12-10 | 1966-01-11 | 2 | Details |
| US3229253A | Matrix for reading out stored data | Expired / Lapsed | 1959-03-30 | 1966-01-11 | 2 | Details |
| US3227865A | Residue checking system | Expired / Lapsed | 1962-06-29 | 1966-01-04 | 1 | Details |
| US3228002A | Parallel input extreme signal indicator having a control im… | Expired / Lapsed | 1961-02-02 | 1966-01-04 | 2 | Details |
| US3228005A | Apparatus for manipulating data on a byte basis | Expired / Lapsed | 1960-12-30 | 1966-01-04 | 2 | Details |
| US3226534A | Superconductive adder and correlator | Expired / Lapsed | 1961-12-07 | 1965-12-28 | 1 | Details |
| US3226684A | Computer control apparatus | Expired / Lapsed | 1960-12-29 | 1965-12-28 | 2 | Details |
| US3226683A | Sequential decision making device | Expired / Lapsed | 1960-10-19 | 1965-12-28 | 2 | Details |
| US3225333A | Differential quantitized storage and compression | Expired / Lapsed | 1961-12-28 | 1965-12-21 | 2 | Details |
| US3225212A | Tunnel diode gating circuit with self reset | Expired / Lapsed | 1960-12-07 | 1965-12-21 | 0 | Details |
| US3223925A | Digital data modulation device | Expired / Lapsed | 1962-01-29 | 1965-12-14 | 1 | Details |
| US3222638A | Specimen identification apparatus utilizing optical autocor… | Expired / Lapsed | 1961-12-04 | 1965-12-07 | 2 | Details |
| US3222653A | Memory system for using a memory despite the presence of de… | Expired / Lapsed | 1961-09-18 | 1965-12-07 | 2 | Details |
| US3222643A | Error detecting and correcting systems | Expired / Lapsed | 1961-06-22 | 1965-12-07 | 1 | Details |
| US3222650A | Interpretation machine | Expired / Lapsed | 1960-12-30 | 1965-12-07 | 1 | Details |
| US3222647A | Data processing equipment | Expired / Lapsed | 1960-02-04 | 1965-12-07 | 0 | Details |
| US3221158A | Combinatorial word analyzer | Expired / Lapsed | 1961-06-28 | 1965-11-30 | 2 | Details |
| US3221308A | Memory system | Expired / Lapsed | 1960-12-30 | 1965-11-30 | 2 | Details |
| US3220013A | High speed electro-optic printer | Expired / Lapsed | 1963-10-21 | 1965-11-23 | 2 | Details |
| US3219980A | Computer multiplexing apparatus | Expired / Lapsed | 1960-06-30 | 1965-11-23 | 2 | Details |
| US3218611A | Data transfer control device | Expired / Lapsed | 1961-04-18 | 1965-11-16 | 2 | Details |
| US3217170A | Rotary optical servomechanism | Expired / Lapsed | 1962-12-31 | 1965-11-09 | 2 | Details |
| US3217316A | Binary to ternary converter | Expired / Lapsed | 1961-12-18 | 1965-11-09 | 2 | Details |
| US3217298A | Electronic digital computing machines | Expired / Lapsed | 1961-04-18 | 1965-11-09 | 2 | Details |
| CA720963A | Fibre deflection means | Expired / Lapsed | — | 1965-11-02 | 0 | Details |
| US3216003A | Conversion system | Expired / Lapsed | 1961-06-06 | 1965-11-02 | 2 | Details |
| US3215819A | Memory system | Expired / Lapsed | 1961-05-29 | 1965-11-02 | 1 | Details |
| US3212918A | Electroless plating process | Expired / Lapsed | 1962-05-28 | 1965-10-19 | 2 | Details |
| US3212929A | Method of forming a glass film on an object | Expired / Lapsed | 1962-03-22 | 1965-10-19 | 2 | Details |
| US3213370A | Signal selecting system with switching at the interstice be… | Expired / Lapsed | 1961-03-13 | 1965-10-19 | 2 | Details |
| US3210729A | Data display system | Expired / Lapsed | 1961-12-18 | 1965-10-05 | 0 | Details |
| US3209328A | Adaptive recognition system for recognizing similar patterns | Expired / Lapsed | 1963-02-28 | 1965-09-28 | 1 | Details |
| US3208342A | Electro-optic light coupling of optical fibers | Expired / Lapsed | 1962-09-18 | 1965-09-28 | 2 | Details |
| US3209251A | Period-to-rate converter having means for summing capacitor… | Expired / Lapsed | 1961-10-23 | 1965-09-28 | 2 | Details |
| US3208057A | Format control for disk recording | Expired / Lapsed | 1961-12-26 | 1965-09-21 | 2 | Details |
| US3208050A | Data system with aperiodic synchronization | Expired / Lapsed | 1961-06-28 | 1965-09-21 | 2 | Details |
| US3208048A | Electronic digital computing machines with priority interru… | Expired / Lapsed | 1961-06-27 | 1965-09-21 | 2 | Details |
| US3208049A | Synchronous transmitter-receiver | Expired / Lapsed | 1960-08-25 | 1965-09-21 | 0 | Details |
| US3205302A | Facsimile transmission system | Expired / Lapsed | 1962-11-02 | 1965-09-07 | 2 | Details |
| US3205488A | Cathode ray tube having resistor deflection control | Expired / Lapsed | 1962-04-24 | 1965-09-07 | 2 | Details |
| US3202972A | Message handling system | Expired / Lapsed | 1962-07-17 | 1965-08-24 | 2 | Details |
| US3202834A | Frequency discriminating circuit | Expired / Lapsed | 1961-10-13 | 1965-08-24 | 1 | Details |
| US3202971A | Data processing system programmed by instruction and associ… | Expired / Lapsed | 1960-12-30 | 1965-08-24 | 2 | Details |
| US3202964A | Cryogenic memory system | Expired / Lapsed | 1960-10-25 | 1965-08-24 | 2 | Details |
| US3202969A | Electronic calculator | Expired / Lapsed | 1959-12-30 | 1965-08-24 | 1 | Details |
| US3201759A | Data input device | Expired / Lapsed | 1959-12-30 | 1965-08-17 | 2 | Details |
| US3199099A | Multi-stage binary-coded-decimal to decimal conversion mean… | Expired / Lapsed | 1962-02-09 | 1965-08-03 | 2 | Details |
| US3199085A | Computer with table lookup arithmetic unit feature | Expired / Lapsed | 1960-12-20 | 1965-08-03 | 2 | Details |
| US3199078A | Character identification device | Expired / Lapsed | 1960-02-05 | 1965-08-03 | 2 | Details |
| US3199082A | Memory system | Expired / Lapsed | 1959-11-27 | 1965-08-03 | 2 | Details |
| US3197740A | Data storage and processing machine | Expired / Lapsed | 1958-08-29 | 1965-07-27 | 2 | Details |
| US3197739A | Magnetic recording system | Expired / Lapsed | 1958-06-30 | 1965-07-27 | 2 | Details |
| US3196399A | Specimen identification techniques employing selected funct… | Expired / Lapsed | 1962-10-01 | 1965-07-20 | 2 | Details |
| US3196398A | Pattern recognition preprocessing techniques | Expired / Lapsed | 1962-05-21 | 1965-07-20 | 1 | Details |
| US3196404A | Printer buffer load and read control means | Expired / Lapsed | 1961-06-26 | 1965-07-20 | 2 | Details |
| US3196260A | Adder | Expired / Lapsed | 1961-05-03 | 1965-07-20 | 1 | Details |
| US3196284A | Logical signal processing apparatus | Expired / Lapsed | 1961-04-21 | 1965-07-20 | 1 | Details |
| US3196394A | Specimen identification techniques employing non-linear fun… | Expired / Lapsed | 1961-03-03 | 1965-07-20 | 2 | Details |
| US3196392A | Specimen identification utilizing autocorrelation functions | Expired / Lapsed | 1960-07-25 | 1965-07-20 | 2 | Details |
| US3196258A | Counter step checking | Expired / Lapsed | 1960-06-02 | 1965-07-20 | 2 | Details |
| US3195109A | Associative memory match indicator control | Expired / Lapsed | 1962-04-02 | 1965-07-13 | 1 | Details |
| US3195118A | Data storage timing system | Expired / Lapsed | 1961-08-24 | 1965-07-13 | 2 | Details |
| US3192363A | Binary multipler for skipping a string of zeroes or ones | Expired / Lapsed | 1961-05-24 | 1965-06-29 | 2 | Details |
| US3191136A | D. c. transformer for superconductive circuitry | Expired / Lapsed | 1962-11-21 | 1965-06-22 | 2 | Details |
| US3191150A | Specimen identification system with adaptive and non-adapti… | Expired / Lapsed | 1962-10-30 | 1965-06-22 | 2 | Details |
| US3191149A | Specimen identification apparatus with means for altering s… | Expired / Lapsed | 1962-01-15 | 1965-06-22 | 2 | Details |
| US3191155A | Logical circuits and memory | Expired / Lapsed | 1960-08-22 | 1965-06-22 | 2 | Details |
| US3189153A | Keyboard | Expired / Lapsed | 1962-07-03 | 1965-06-15 | 2 | Details |
| US3188455A | Integrating means | Expired / Lapsed | 1960-12-29 | 1965-06-08 | 2 | Details |
| US3187305A | Character recognition systems | Expired / Lapsed | 1960-10-03 | 1965-06-01 | 2 | Details |
| US3185966A | Data editing system | Expired / Lapsed | 1962-05-04 | 1965-05-25 | 2 | Details |
| US3185967A | Two dimensional selection system for read only memory | Expired / Lapsed | 1962-02-23 | 1965-05-25 | 0 | Details |
| US3185823A | Data compactor | Expired / Lapsed | 1961-10-24 | 1965-05-25 | 1 | Details |
| US3185824A | Adaptive data compactor | Expired / Lapsed | 1961-10-24 | 1965-05-25 | 1 | Details |
| US3185850A | Photosensitive two state circuits and systems | Expired / Lapsed | 1961-06-29 | 1965-05-25 | 1 | Details |
| US3183303A | System for voice answer-back from data processor | Expired / Lapsed | 1961-12-21 | 1965-05-11 | 0 | Details |
| US3183370A | Transistor logic circuits operable through feedback circuit… | Expired / Lapsed | 1961-12-07 | 1965-05-11 | 2 | Details |
| US3183518A | Record perforating apparatus | Expired / Lapsed | 1961-12-04 | 1965-05-11 | 2 | Details |
| US3183410A | Magnetic multipositioning actuators | Expired / Lapsed | 1960-12-30 | 1965-05-11 | 1 | Details |
| US3182291A | Utensil for writing and simultaneously recognizing the writ… | Expired / Lapsed | 1961-08-25 | 1965-05-04 | 2 | Details |
| US3181046A | Gated pulse amplifier servomechanism | Expired / Lapsed | 1962-07-02 | 1965-04-27 | 2 | Details |
| US3177376A | Semiconductor logic circuit comprising tunnel diodes and ba… | Expired / Lapsed | 1961-07-17 | 1965-04-06 | 2 | Details |
| US3176269A | Ring counter checking circuit | Expired / Lapsed | 1962-05-28 | 1965-03-30 | 2 | Details |
| US3176279A | Data storage apparatus | Expired / Lapsed | 1959-02-09 | 1965-03-30 | 2 | Details |
| US3174058A | Bilateral current driver | Expired / Lapsed | 1961-10-02 | 1965-03-16 | 2 | Details |
| US3173878A | Process of making microcapsules | Expired / Lapsed | 1960-02-26 | 1965-03-16 | 2 | Details |
| US3174140A | Magneto-optical recording and readout device | Expired / Lapsed | 1959-07-01 | 1965-03-16 | 1 | Details |
| US3172083A | Electrolytic memory | Expired / Lapsed | 1962-01-12 | 1965-03-02 | 1 | Details |
| US3171761A | Particular masking configuration in a vapor deposition proc… | Expired / Lapsed | 1961-10-06 | 1965-03-02 | 2 | Details |
| US3171107A | Wide-record narrow-read magnetic head | Expired / Lapsed | 1961-07-03 | 1965-02-23 | 2 | Details |
| US3171114A | Automatic programmer | Expired / Lapsed | 1961-01-03 | 1965-02-23 | 2 | Details |
| US3170071A | Error correction device utilizing spare substitution | Expired / Lapsed | 1960-03-30 | 1965-02-16 | 2 | Details |
| US3170142A | Data processing machine | Expired / Lapsed | 1956-09-26 | 1965-02-16 | 2 | Details |
| US3167746A | Specimen identification methods and apparatus | Expired / Lapsed | 1962-09-20 | 1965-01-26 | 2 | Details |
| US3167740A | Data comparison system utilizing a universal character | Expired / Lapsed | 1961-04-12 | 1965-01-26 | 2 | Details |
| US3167646A | Apparatus for processing data including an instruction and … | Expired / Lapsed | 1961-03-31 | 1965-01-26 | 2 | Details |
| US3167743A | Unambiguous identification systems | Expired / Lapsed | 1960-12-19 | 1965-01-26 | 1 | Details |
| US3167644A | Open loop and closed loop integrator of an analog physical … | Expired / Lapsed | 1960-06-22 | 1965-01-26 | 2 | Details |
| US3166737A | Asynchronous data processor | Expired / Lapsed | 1960-12-23 | 1965-01-19 | 2 | Details |
| US3166668A | Computer program system | Expired / Lapsed | 1960-03-24 | 1965-01-19 | 1 | Details |
| US3166640A | Intelligence conversion system | Expired / Lapsed | 1960-02-12 | 1965-01-19 | 1 | Details |
| US3163850A | Record scatter variable | Expired / Lapsed | 1960-12-27 | 1964-12-29 | 0 | Details |
| US3163848A | Double error correcting system | Expired / Lapsed | 1959-12-22 | 1964-12-29 | 2 | Details |
| US3162837A | Error correcting code device with modulo-2 adder and feedba… | Expired / Lapsed | — | 1964-12-22 | 1 | Details |
| US3162770A | Transistor structure | Expired / Lapsed | 1958-09-26 | 1964-12-22 | 1 | Details |
| US3161542A | Peltier heating and cooling of substrates and masks | Expired / Lapsed | 1961-12-29 | 1964-12-15 | 2 | Details |
| US3160858A | Control system for computer | Expired / Lapsed | 1961-09-29 | 1964-12-08 | 2 | Details |
| US3160854A | Lattice-type character recognition system | Expired / Lapsed | 1961-01-12 | 1964-12-08 | 2 | Details |
| US3160853A | Character recognition apparatus | Expired / Lapsed | 1959-12-21 | 1964-12-08 | 2 | Details |
| US3158754A | Double injection semiconductor device | Expired / Lapsed | 1961-10-05 | 1964-11-24 | 2 | Details |
| US3157265A | Print interlock for typewriter | Expired / Lapsed | 1962-03-29 | 1964-11-17 | 2 | Details |
| US3157779A | Core matrix calculator | Expired / Lapsed | 1960-06-28 | 1964-11-17 | 2 | Details |
| US3157780A | Pulse train sensing circuitry | Expired / Lapsed | 1960-06-27 | 1964-11-17 | 1 | Details |
| US3157792A | Exclusive-or photoresponsive logical circuits | Expired / Lapsed | 1960-01-21 | 1964-11-17 | 1 | Details |
| US3157860A | Core driver checking circuit | Expired / Lapsed | 1958-06-30 | 1964-11-17 | 2 | Details |
| US3156875A | Constant amplitude, variable frequency sawtooth generator | Expired / Lapsed | 1961-06-14 | 1964-11-10 | 2 | Details |
| US3156897A | Data processing system with look ahead feature | Expired / Lapsed | 1960-12-01 | 1964-11-10 | 2 | Details |
| US3156906A | Transducer positioning mechanism in a random access memory … | Expired / Lapsed | 1959-10-16 | 1964-11-10 | 2 | Details |
| US3154730A | Speed control of a d. c. motor | Expired / Lapsed | 1961-03-14 | 1964-10-27 | 2 | Details |
| US3154762A | Skew indicator | Expired / Lapsed | 1959-09-18 | 1964-10-27 | 1 | Details |
| US3153775A | Table look-up system | Expired / Lapsed | 1959-02-11 | 1964-10-20 | 2 | Details |
| US3153223A | Arithmetic unit sequence control circuit | Expired / Lapsed | 1960-02-02 | 1964-10-13 | 2 | Details |
| US3151543A | High speed printer with magnetostrictive impression members | Expired / Lapsed | 1961-09-28 | 1964-10-06 | 2 | Details |
| US3151796A | Web feeding device | Expired / Lapsed | 1961-06-29 | 1964-10-06 | 1 | Details |
| US3152318A | Character recognizer | Expired / Lapsed | 1961-02-16 | 1964-10-06 | 2 | Details |
| US3152012A | Apparatus for the development of electrostatic images | Expired / Lapsed | 1960-12-19 | 1964-10-06 | 2 | Details |
| US3150939A | High density record carrier | Expired / Lapsed | 1961-07-17 | 1964-09-29 | 2 | Details |
| US3150356A | Magnetic patterns | Expired / Lapsed | 1961-12-22 | 1964-09-22 | 2 | Details |
| US3150351A | Computer manual keyboard entry | Expired / Lapsed | 1957-09-10 | 1964-09-22 | 1 | Details |
| US3148877A | Sheet driving and aligning mechanism | Expired / Lapsed | 1962-02-12 | 1964-09-15 | 2 | Details |
| US3149316A | Inductive matrix arrangement for sensing magnetic configura… | Expired / Lapsed | 1960-09-09 | 1964-09-15 | 2 | Details |
| US3148366A | Analog to digital converter | Expired / Lapsed | 1962-12-24 | 1964-09-08 | 2 | Details |
| US3147679A | Electrostatic image transfer processes and apparatus theref… | Expired / Lapsed | 1961-12-18 | 1964-09-08 | 1 | Details |
| US3145293A | Bi-directional binary counter | Expired / Lapsed | 1961-06-05 | 1964-08-18 | 2 | Details |
| US3145302A | Electro-optical circuitry having improved response speed | Expired / Lapsed | 1961-03-30 | 1964-08-18 | 2 | Details |
| US3144635A | Error correcting system for binary erasure channel transmis… | Expired / Lapsed | 1961-12-14 | 1964-08-11 | 2 | Details |
| US3144366A | Method of fabricating a plurality of pn junctions in a semi… | Expired / Lapsed | 1961-08-16 | 1964-08-11 | 2 | Details |
| US3144609A | Signal to noise enhancement technique for binary transmissi… | Expired / Lapsed | 1960-12-30 | 1964-08-11 | 2 | Details |
| US3142582A | Method of treating polyester polymer materials to improve t… | Expired / Lapsed | 1961-11-17 | 1964-07-28 | 2 | Details |
| US3141964A | Calculating memory | Expired / Lapsed | 1960-12-30 | 1964-07-21 | 1 | Details |
| US3140473A | Information storage system | Expired / Lapsed | 1960-05-12 | 1964-07-07 | 2 | Details |
| US3140472A | Data transfer apparatus | Expired / Lapsed | 1959-12-30 | 1964-07-07 | 1 | Details |
| US3140466A | Character recognition system | Expired / Lapsed | 1957-12-23 | 1964-07-07 | 1 | Details |
| US3138701A | Self-checking numbering devices | Expired / Lapsed | 1959-12-29 | 1964-06-23 | 2 | Details |
| US3137818A | Signal generator with external start pulse phase control | Expired / Lapsed | 1961-12-27 | 1964-06-16 | 2 | Details |
| US3135371A | Means to prevent machine operation upon depression of plura… | Expired / Lapsed | 1963-03-18 | 1964-06-02 | 2 | Details |
| US3135946A | Error correction device | Expired / Lapsed | 1960-07-29 | 1964-06-02 | 2 | Details |
| US3134099A | Ultrasonic data converter | Expired / Lapsed | 1962-12-21 | 1964-05-19 | 2 | Details |
| US3134095A | Cryogenic memory systems | Expired / Lapsed | 1958-06-24 | 1964-05-19 | 1 | Details |
| US3134091A | Means to read out less than all bits in a register | Expired / Lapsed | 1957-07-02 | 1964-05-19 | 2 | Details |
| US3132324A | Computer memory unit and addressing means | Expired / Lapsed | 1958-01-21 | 1964-05-05 | 2 | Details |
| US3131293A | Computing system | Expired / Lapsed | 1960-07-14 | 1964-04-28 | 2 | Details |
| US3131291A | Associative memory | Expired / Lapsed | 1960-07-11 | 1964-04-28 | 2 | Details |
| US3130254A | Optical maser having terminal level above ground state | Expired / Lapsed | 1960-12-05 | 1964-04-21 | 2 | Details |
| US3128040A | Fluid logic device | Expired / Lapsed | 1962-10-29 | 1964-04-07 | 2 | Details |
| US3121863A | High speed data tape handling mechanism | Expired / Lapsed | 1960-05-31 | 1964-02-18 | 2 | Details |
| US3121217A | Memory and circuits therefor | Expired / Lapsed | 1960-08-12 | 1964-02-11 | 2 | Details |
| US3119984A | Analog voltage memory | Expired / Lapsed | 1960-12-22 | 1964-01-28 | 2 | Details |
| US3119983A | Time pulse distributor | Expired / Lapsed | 1959-05-29 | 1964-01-28 | 2 | Details |
| US3120001A | Magnetic transducer | Expired / Lapsed | 1958-12-08 | 1964-01-28 | 1 | Details |
| US3117306A | Multiplex computer inquiry stations | Expired / Lapsed | 1958-02-17 | 1964-01-07 | 2 | Details |
| US3116458A | Peak sensing system employing sampling and logic circuits c… | Expired / Lapsed | 1959-12-21 | 1963-12-31 | 2 | Details |
| US3115574A | High-speed multiplier | Expired / Lapsed | 1961-11-29 | 1963-12-24 | 1 | Details |
| US3115583A | Information-gated flip-flop adapted to generate output in r… | Expired / Lapsed | 1960-04-18 | 1963-12-24 | 2 | Details |
| US3114883A | Reversible electronic counter | Expired / Lapsed | 1961-08-29 | 1963-12-17 | 2 | Details |
| US3114130A | Single error correcting system utilizing maximum length shi… | Expired / Lapsed | 1959-12-22 | 1963-12-10 | 2 | Details |
| US3114131A | Single track character sensing | Expired / Lapsed | 1958-10-15 | 1963-12-10 | 2 | Details |
| US3113297A | Binary information transfer device | Expired / Lapsed | 1961-03-17 | 1963-12-03 | 2 | Details |
| US3113296A | Electronic circuits | Expired / Lapsed | 1958-12-02 | 1963-12-03 | 2 | Details |
| US3111648A | Conversion apparatus | Expired / Lapsed | 1960-03-31 | 1963-11-19 | 1 | Details |
| US3111649A | Capacitor digital data storage and regeneration system | Expired / Lapsed | 1958-02-24 | 1963-11-19 | 1 | Details |
| US3111611A | Graded energy gap semiconductor devices | Expired / Lapsed | 1957-09-24 | 1963-11-19 | 2 | Details |
| US3110620A | Method of making plural layer thin film devices | Expired / Lapsed | 1960-06-28 | 1963-11-12 | 2 | Details |
| US3109749A | Wear resistant magnetic recording media | Expired / Lapsed | 1961-12-11 | 1963-11-05 | 2 | Details |
| US3108534A | High speed printer | Expired / Lapsed | 1960-09-20 | 1963-10-29 | 2 | Details |
| US3109162A | Data boundary cross-over and/or advance data access system | Expired / Lapsed | 1959-01-15 | 1963-10-29 | 2 | Details |
| US3108268A | Communicator | Expired / Lapsed | 1959-12-30 | 1963-10-22 | 0 | Details |
| US3108256A | Logical clearing of memory devices | Expired / Lapsed | 1958-12-30 | 1963-10-22 | 2 | Details |
| US3108257A | Locking and unlocking of memory devices | Expired / Lapsed | 1958-12-30 | 1963-10-22 | 1 | Details |
| US3107343A | Information retrieval system | Expired / Lapsed | 1959-11-27 | 1963-10-15 | 0 | Details |
| US3107342A | Editing machine | Expired / Lapsed | 1957-12-23 | 1963-10-15 | 2 | Details |
| US3107301A | Pulse responsive photosensitive electrooptical circuit | Expired / Lapsed | 1956-01-18 | 1963-10-15 | 2 | Details |
| US3105963A | Transducer positioning system | Expired / Lapsed | 1959-02-27 | 1963-10-01 | 2 | Details |
| US3105228A | Magnetic drum system | Expired / Lapsed | 1960-04-25 | 1963-09-24 | 1 | Details |
| US3104332A | Non-synchronous scanning circuit | Expired / Lapsed | 1961-12-04 | 1963-09-17 | 1 | Details |
| US3104380A | Memory system | Expired / Lapsed | 1959-11-27 | 1963-09-17 | 2 | Details |
| US3103399A | Strain relief device | Expired / Lapsed | 1960-12-07 | 1963-09-10 | 1 | Details |
| US3103658A | Character generation system | Expired / Lapsed | 1958-01-13 | 1963-09-10 | 2 | Details |
| US3103000A | Skew correction system | Expired / Lapsed | 1960-04-01 | 1963-09-03 | 2 | Details |
| US3100888A | Checking system | Expired / Lapsed | 1960-12-13 | 1963-08-13 | 0 | Details |
| US3100723A | Process of making multi-layer devices | Expired / Lapsed | 1960-08-29 | 1963-08-13 | 2 | Details |
| US3100889A | Apparatus for sensing variations | Expired / Lapsed | 1958-04-17 | 1963-08-13 | 2 | Details |
| US3099608A | Method of electroplating on a dielectric base | Expired / Lapsed | 1959-12-30 | 1963-07-30 | 2 | Details |
| US3099818A | Scan element for computer | Expired / Lapsed | 1959-06-30 | 1963-07-30 | 1 | Details |
| US3098939A | Integrating pulse circuit having regenerative feed back to … | Expired / Lapsed | 1961-12-21 | 1963-07-23 | 1 | Details |
| US3098803A | Thin magnetic film | Expired / Lapsed | 1960-06-23 | 1963-07-23 | 2 | Details |
| US3098112A | Vapor cell light modulator | Expired / Lapsed | 1959-07-22 | 1963-07-16 | 2 | Details |
| US3095654A | Educational device | Expired / Lapsed | 1961-09-14 | 1963-07-02 | 1 | Details |
| US3096471A | Optimizing automatic control servosystem | Expired / Lapsed | 1960-10-07 | 1963-07-02 | 2 | Details |
| US3096209A | Formation of semiconductor bodies | Expired / Lapsed | 1960-05-18 | 1963-07-02 | 0 | Details |
| US3096508A | Input output apparatus | Expired / Lapsed | 1959-12-31 | 1963-07-02 | 2 | Details |
| US3096511A | Apparatus for effecting concurrent record, read and checkin… | Expired / Lapsed | 1959-02-25 | 1963-07-02 | 2 | Details |
| US3094614A | Full adder and subtractor using nor logic | Expired / Lapsed | 1961-12-14 | 1963-06-18 | 2 | Details |
| US3094261A | Tape carriage control | Expired / Lapsed | 1961-01-09 | 1963-06-18 | 2 | Details |
| US3094685A | Non-destructive readout system | Expired / Lapsed | 1957-09-30 | 1963-06-18 | 1 | Details |
| US3093814A | Tag memory | Expired / Lapsed | 1959-04-29 | 1963-06-11 | 2 | Details |
| US3093818A | Domain rotational memory system | Expired / Lapsed | 1956-10-08 | 1963-06-11 | 2 | Details |
| US3089988A | Slewing motor servo system with null sensing relay circuit | Expired / Lapsed | 1960-06-29 | 1963-05-14 | 2 | Details |
| US3090023A | Superconductor circuit | Expired / Lapsed | 1959-06-30 | 1963-05-14 | 2 | Details |
| US3088888A | Methods of etching a semiconductor device | Expired / Lapsed | 1959-03-31 | 1963-05-07 | 2 | Details |
| US3089125A | Automatic storage addressing apparatus | Expired / Lapsed | 1957-01-11 | 1963-05-07 | 2 | Details |
| US3088041A | Single pulse generator employing integrator and logic gates… | Expired / Lapsed | 1959-12-15 | 1963-04-30 | 0 | Details |
| US3088069A | Intelligence communication system | Expired / Lapsed | 1958-06-23 | 1963-04-30 | 0 | Details |
| US3086706A | Data processing machine | Expired / Lapsed | 1959-11-27 | 1963-04-23 | 1 | Details |
| US3086130A | Cryogenic coupling device | Expired / Lapsed | 1961-09-22 | 1963-04-16 | 1 | Details |
| US3086197A | Cryogenic memory system | Expired / Lapsed | 1958-12-19 | 1963-04-16 | 1 | Details |
| US3086198A | Core code translator | Expired / Lapsed | 1958-07-24 | 1963-04-16 | 2 | Details |
| US3085230A | Method and apparatus for verifying location and recycling t… | Expired / Lapsed | 1958-11-14 | 1963-04-09 | 2 | Details |
| US3085232A | Magnetic storage devices | Expired / Lapsed | 1958-10-03 | 1963-04-09 | 2 | Details |
| US3084337A | Variable gain control | Expired / Lapsed | 1957-12-27 | 1963-04-02 | 2 | Details |
| US3082854A | Typewriter input checking mechanism | Expired / Lapsed | 1961-05-12 | 1963-03-26 | 2 | Details |
| US3081942A | Digital-to-analog control system | Expired / Lapsed | 1961-09-18 | 1963-03-19 | 2 | Details |
| US3081682A | Method and apparatus for obtaining and maintaining spacing … | Expired / Lapsed | 1961-06-28 | 1963-03-19 | 2 | Details |
| US3082283A | Radiant energy responsive semiconductor device | Expired / Lapsed | 1959-11-25 | 1963-03-19 | 2 | Details |
| US3081447A | Apparatus and methods for automatic indexing and storage | Expired / Lapsed | 1961-04-10 | 1963-03-12 | 2 | Details |
| US3078732A | Incremental drive mechanism | Expired / Lapsed | 1959-12-30 | 1963-02-26 | 2 | Details |
| US3079512A | Semiconductor devices comprising an esaki diode and convent… | Expired / Lapsed | 1959-08-05 | 1963-02-26 | 2 | Details |
| US3079597A | Byte converter | Expired / Lapsed | 1959-01-02 | 1963-02-26 | 2 | Details |
| US3079511A | Controlled, regenerative feedback transmission gate with sh… | Expired / Lapsed | 1958-12-31 | 1963-02-26 | 1 | Details |
| US3079594A | Decoding device | Expired / Lapsed | 1957-08-23 | 1963-02-26 | 1 | Details |
| US3078417A | Counter employing logic gates in feedback to achieve proper… | Expired / Lapsed | 1960-12-29 | 1963-02-19 | 2 | Details |
| US3078448A | Dual-channel sensing | Expired / Lapsed | 1957-07-15 | 1963-02-19 | 2 | Details |
| US3077150A | Apparatus for reproducing images | Expired / Lapsed | 1960-07-25 | 1963-02-12 | 2 | Details |
| US3077580A | Data processing system | Expired / Lapsed | 1959-09-08 | 1963-02-12 | 2 | Details |
| US3077585A | Shift register | Expired / Lapsed | 1958-10-27 | 1963-02-12 | 2 | Details |
| US3077579A | Operation checking system for data storage and processing m… | Expired / Lapsed | 1958-08-29 | 1963-02-12 | 1 | Details |
| US3075091A | Data latching systems | Expired / Lapsed | 1960-02-03 | 1963-01-22 | 2 | Details |
| US3074050A | Character recognition machine | Expired / Lapsed | 1956-12-31 | 1963-01-15 | 1 | Details |
| US3072332A | Analog-to-digital converter | Expired / Lapsed | 1960-10-27 | 1963-01-08 | 1 | Details |
| US3072886A | Apparatus for analyzing intelligence manifestations | Expired / Lapsed | 1956-04-02 | 1963-01-08 | 2 | Details |
| US3070713A | Three stable state count down device | Expired / Lapsed | 1959-11-16 | 1962-12-25 | 0 | Details |
| US3069815A | Cleaning tape for information sensing apparatus | Expired / Lapsed | 1958-10-02 | 1962-12-25 | 0 | Details |
| US3070709A | Inverter circuit and complementing flip-flop using constant… | Expired / Lapsed | 1958-05-22 | 1962-12-25 | 0 | Details |
| US3069086A | Matrix switching and computing systems | Expired / Lapsed | 1959-11-05 | 1962-12-18 | 0 | Details |
| US3069667A | Transducer apparatus | Expired / Lapsed | 1958-11-26 | 1962-12-18 | 0 | Details |
| US3067937A | Control element for computing devices | Expired / Lapsed | 1959-06-08 | 1962-12-11 | 0 | Details |
| US3067358A | Electro-erosion apparatus | Expired / Lapsed | 1960-11-02 | 1962-12-04 | 0 | Details |
| US3067071A | Semiconductor devices and methods of applying metal films t… | Expired / Lapsed | 1960-01-04 | 1962-12-04 | 2 | Details |
| US3066601A | Error checking devices | Expired / Lapsed | 1959-12-29 | 1962-12-04 | 0 | Details |
| US3066231A | Flip-flop circuit having pulse-forming networks in the cros… | Expired / Lapsed | 1958-07-30 | 1962-11-27 | 0 | Details |
| US3065356A | Electro-optical card reader | Expired / Lapsed | 1961-04-14 | 1962-11-20 | 0 | Details |
| US3064519A | Specimen identification apparatus and method | Expired / Lapsed | 1960-05-16 | 1962-11-20 | 0 | Details |
| US3065113A | Compound semiconductor material control | Expired / Lapsed | 1959-06-30 | 1962-11-20 | 1 | Details |
| US3064895A | Sensing instruction apparatus for data processing machine | Expired / Lapsed | 1958-02-05 | 1962-11-20 | 0 | Details |
| US3064341A | Semiconductor devices | Expired / Lapsed | 1956-12-26 | 1962-11-20 | 0 | Details |
| US3063636A | Matrix arithmetic system with input and output error checki… | Expired / Lapsed | 1959-07-06 | 1962-11-13 | 0 | Details |
| US3061886A | Method for producing a form-retaining roll of extensible ta… | Expired / Lapsed | 1960-08-12 | 1962-11-06 | 2 | Details |
| US3059611A | Monitoring apparatus | Expired / Lapsed | 1960-07-05 | 1962-10-23 | 0 | Details |
| US3058659A | Add address to memory instruction | Expired / Lapsed | 1958-12-31 | 1962-10-16 | 0 | Details |
| US3059222A | Transfer instruction | Expired / Lapsed | 1958-12-31 | 1962-10-16 | 0 | Details |
| US3057967A | Magnetic transducer | Expired / Lapsed | 1958-05-21 | 1962-10-09 | 0 | Details |
| US3055770A | Thin magnetic films | Expired / Lapsed | 1960-12-23 | 1962-09-25 | 2 | Details |
| US3055006A | High density, erasable optical image recorder | Expired / Lapsed | 1961-01-24 | 1962-09-18 | 0 | Details |
| US3052407A | Data storage device | Expired / Lapsed | 1958-12-19 | 1962-09-04 | 0 | Details |
| US3051387A | Asynchronous adder-subtractor system | Expired / Lapsed | 1959-02-24 | 1962-08-28 | 0 | Details |
| US3049990A | Print hammer actuator | Expired / Lapsed | 1960-12-20 | 1962-08-21 | 0 | Details |
| US3050673A | Voltage holding circuit | Expired / Lapsed | 1960-10-14 | 1962-08-21 | 0 | Details |
| US3050636A | High speed transistor switch | Expired / Lapsed | 1960-08-24 | 1962-08-21 | 0 | Details |
| US3050639A | Single shot multivibrator with pulse width control | Expired / Lapsed | 1958-10-30 | 1962-08-21 | 0 | Details |
| US3049291A | Tape reader control | Expired / Lapsed | 1959-09-30 | 1962-08-14 | 0 | Details |
| US3048333A | Fast multiply apparatus in an electronic digital computer | Expired / Lapsed | 1957-12-26 | 1962-08-07 | 0 | Details |
| US3048332A | Program interrupt system | Expired / Lapsed | 1957-12-09 | 1962-08-07 | 0 | Details |
| US3047438A | Epitaxial semiconductor deposition and apparatus | Expired / Lapsed | 1959-05-28 | 1962-07-31 | 1 | Details |
| US3047423A | Isotropic thin magnetic film | Expired / Lapsed | 1958-12-17 | 1962-07-31 | 1 | Details |
| US3046413A | Transistor multiple count trigger with stepwave generator g… | Expired / Lapsed | 1960-12-16 | 1962-07-24 | 0 | Details |
| US3046540A | Electro-optical translator | Expired / Lapsed | 1959-06-10 | 1962-07-24 | 0 | Details |
| US3046523A | Counter checking circuit | Expired / Lapsed | 1958-06-23 | 1962-07-24 | 0 | Details |
| US3046485A | Bi-stable switching circuit with pulse overlap discriminati… | Expired / Lapsed | 1958-04-25 | 1962-07-24 | 0 | Details |
| US3046528A | Transfer mechanism for storage devices | Expired / Lapsed | 1957-09-06 | 1962-07-24 | 0 | Details |
| US3045209A | Checking system for data selection network | Expired / Lapsed | 1959-04-15 | 1962-07-17 | 0 | Details |
| US3043509A | Normalizing apparatus for floating point operations | Expired / Lapsed | 1959-09-08 | 1962-07-10 | 0 | Details |
| US3042178A | Carriage control | Expired / Lapsed | 1959-10-02 | 1962-07-03 | 0 | Details |
| US3042818A | Stepping motor | Expired / Lapsed | 1958-12-22 | 1962-07-03 | 0 | Details |
| US3042616A | Process of preparing magnetic ink | Expired / Lapsed | 1958-08-26 | 1962-07-03 | 2 | Details |
| US3042903A | Means for transferring information between plural memory de… | Expired / Lapsed | 1957-01-15 | 1962-07-03 | 0 | Details |
| US3040300A | Data selector | Expired / Lapsed | 1957-03-25 | 1962-06-19 | 0 | Details |
| US3040299A | Data storage system | Expired / Lapsed | 1956-05-03 | 1962-06-19 | 0 | Details |
| US3039005A | Electro-optical device | Expired / Lapsed | 1960-04-08 | 1962-06-12 | 0 | Details |
| US3038091A | Threshold counter with parallel inputs | Expired / Lapsed | 1960-06-29 | 1962-06-05 | 0 | Details |
| US3037698A | Error controlled recycling of the readout of stored informa… | Expired / Lapsed | 1960-03-17 | 1962-06-05 | 0 | Details |
| US3038145A | Data transfer and control apparatus | Expired / Lapsed | 1958-03-19 | 1962-06-05 | 0 | Details |
| US3037265A | Method for making printed circuits | Expired / Lapsed | 1957-12-30 | 1962-06-05 | 0 | Details |
| US3037700A | Indexing registers for calculators | Expired / Lapsed | 1956-11-29 | 1962-06-05 | 0 | Details |
| US3037701A | Floating decimal point arithmetic control means for calcula… | Expired / Lapsed | 1956-11-21 | 1962-06-05 | 0 | Details |
| US3036775A | Function generators | Expired / Lapsed | 1960-08-11 | 1962-05-29 | 0 | Details |
| US3037199A | Thin film switching circuit | Expired / Lapsed | 1959-09-14 | 1962-05-29 | 0 | Details |
| US3036770A | Error detecting system for a digital computer | Expired / Lapsed | 1958-08-05 | 1962-05-29 | 0 | Details |
| US3036773A | Indirect addressing in an electronic data processing machine | Expired / Lapsed | 1957-12-26 | 1962-05-29 | 0 | Details |
| US3037128A | Passive element binary circuit gate | Expired / Lapsed | 1957-12-23 | 1962-05-29 | 0 | Details |
| US3037191A | Checking system | Expired / Lapsed | 1956-04-17 | 1962-05-29 | 0 | Details |
| US3036226A | Negative resistance semiconductor circuit utilizing four-la… | Expired / Lapsed | 1959-05-01 | 1962-05-22 | 0 | Details |
| US3036304A | Resilient magnetic drum | Expired / Lapsed | 1958-08-20 | 1962-05-22 | 0 | Details |
| US3035255A | Magnetic recording system | Expired / Lapsed | 1958-12-22 | 1962-05-15 | 0 | Details |
| US3034111A | Data storage system | Expired / Lapsed | 1958-11-24 | 1962-05-08 | 0 | Details |
| US3034102A | Data handling system | Expired / Lapsed | 1958-08-06 | 1962-05-08 | 0 | Details |
| US3034103A | Data comparing and sorting apparatus | Expired / Lapsed | 1958-08-06 | 1962-05-08 | 0 | Details |
| US3031341A | High density magnetic recording tape | Expired / Lapsed | 1958-01-23 | 1962-04-24 | 2 | Details |
| US3028081A | Remote reader system | Expired / Lapsed | 1960-08-23 | 1962-04-03 | 0 | Details |
| US3028552A | Frequency shifting clock | Expired / Lapsed | 1960-04-20 | 1962-04-03 | 0 | Details |
| US3028581A | Switching device | Expired / Lapsed | 1959-05-28 | 1962-04-03 | 0 | Details |
| US3028088A | Multipurpose logical operations | Expired / Lapsed | 1956-09-25 | 1962-04-03 | 0 | Details |
| US3028583A | Information storage calculation system | Expired / Lapsed | 1955-08-10 | 1962-04-03 | 0 | Details |
| US3028078A | Navigation system | Expired / Lapsed | 1953-12-08 | 1962-04-03 | 0 | Details |
| US3027082A | Apparatus for adding and multiplying | Expired / Lapsed | 1954-02-16 | 1962-03-27 | 0 | Details |
| US3026419A | Overlap detector | Expired / Lapsed | 1959-05-11 | 1962-03-20 | 0 | Details |
| US3026037A | Set bit instructions | Expired / Lapsed | 1958-12-31 | 1962-03-20 | 0 | Details |
| US3026036A | Data transfer apparatus | Expired / Lapsed | 1956-01-24 | 1962-03-20 | 0 | Details |
| US3024761A | Vacuum evaporation apparatus | Expired / Lapsed | 1958-07-01 | 1962-03-13 | 0 | Details |
| US3023727A | Substrate processing apparatus | Expired / Lapsed | 1959-09-10 | 1962-03-06 | 0 | Details |
| US3023404A | Magnetic drum head positioning system | Expired / Lapsed | 1957-12-31 | 1962-02-27 | 0 | Details |
| US3022005A | System for comparing information items to determine similar… | Expired / Lapsed | 1959-01-12 | 1962-02-20 | 0 | Details |
| US3021511A | Magnetic memory system | Expired / Lapsed | 1958-12-19 | 1962-02-13 | 0 | Details |
| US3021464A | Tool depth control system | Expired / Lapsed | 1958-03-27 | 1962-02-13 | 0 | Details |
| US3020132A | Single crystal refining | Expired / Lapsed | 1959-04-30 | 1962-02-06 | 1 | Details |
| US3019976A | Data processing system including an indicating register | Expired / Lapsed | 1957-12-26 | 1962-02-06 | 0 | Details |
| US3018722A | Wire printer | Expired / Lapsed | 1958-12-22 | 1962-01-30 | 0 | Details |
| US3018958A | Very high frequency computing circuit | Expired / Lapsed | 1956-08-31 | 1962-01-30 | 0 | Details |
| US3017092A | Program control for data storage and processing machine | Expired / Lapsed | 1957-09-06 | 1962-01-16 | 0 | Details |
| US3017620A | Ring checking circuit | Expired / Lapsed | 1957-03-08 | 1962-01-16 | 0 | Details |
| US3017094A | Order control arrangements for electronic digital computers | Expired / Lapsed | 1956-01-23 | 1962-01-16 | 0 | Details |
| US3015377A | Console typewriter bit printing | Expired / Lapsed | 1960-03-25 | 1962-01-02 | 0 | Details |
| US3015733A | Bipolar switching ring | Expired / Lapsed | 1960-01-12 | 1962-01-02 | 0 | Details |
| US3015441A | Indexing system for calculators | Expired / Lapsed | 1957-09-04 | 1962-01-02 | 0 | Details |
| US3014569A | Keyboard mechanism | Expired / Lapsed | 1960-03-28 | 1961-12-26 | 0 | Details |
| US3014820A | Vapor grown semiconductor device | Expired / Lapsed | 1959-12-31 | 1961-12-26 | 1 | Details |
| US3014654A | Random storage input device | Expired / Lapsed | 1956-04-20 | 1961-12-26 | 0 | Details |
| US3014659A | Electronic integrating means for continuous variable quanti… | Expired / Lapsed | 1953-11-27 | 1961-12-26 | 0 | Details |
| US3012711A | Telephone dial controlled perforator | Expired / Lapsed | 1957-12-30 | 1961-12-12 | 0 | Details |
| US3012726A | Electronic digital computing devices | Expired / Lapsed | 1957-07-22 | 1961-12-12 | 0 | Details |
| US3013250A | Typewriting calculating machine | Expired / Lapsed | 1957-05-17 | 1961-12-12 | 0 | Details |
| US3012713A | Typewriting calculating machine | Expired / Lapsed | 1957-05-17 | 1961-12-12 | 0 | Details |
| US3012227A | Signal storage system | Expired / Lapsed | 1956-09-26 | 1961-12-05 | 0 | Details |
| US3010649A | Fluid apparatus | Expired / Lapsed | 1959-05-27 | 1961-11-28 | 0 | Details |
| US3011061A | Device for identifying characters | Expired / Lapsed | 1959-04-20 | 1961-11-28 | 0 | Details |
| US3011133A | Oscillator utilizing avalanche breakdown of supercooled sem… | Expired / Lapsed | 1958-06-04 | 1961-11-28 | 0 | Details |
| US3010073A | Periodic signal generator | Expired / Lapsed | 1959-11-09 | 1961-11-21 | 0 | Details |
| US3010052A | Tiered electronic package | Expired / Lapsed | 1958-12-31 | 1961-11-21 | 0 | Details |
| US3008113A | Electrical interconnecting and mounting device for printed-… | Expired / Lapsed | 1958-07-30 | 1961-11-07 | 0 | Details |
| US3007057A | Superconductor gating circuits | Expired / Lapsed | 1957-12-27 | 1961-10-31 | 0 | Details |
| US3007090A | Back resistance control for junction semiconductor devices | Expired / Lapsed | 1957-09-04 | 1961-10-31 | 0 | Details |
| US3006259A | Proportional space recording devices | Expired / Lapsed | 1956-06-04 | 1961-10-31 | 0 | Details |
| US3007144A | Data storage apparatus | Expired / Lapsed | 1956-05-14 | 1961-10-31 | 0 | Details |
| US3005189A | Interrecord noise elimination | Expired / Lapsed | 1958-02-17 | 1961-10-17 | 0 | Details |
| US3003141A | Ring circuits | Expired / Lapsed | 1959-02-18 | 1961-10-03 | 0 | Details |
| US3003137A | Binary signal storage | Expired / Lapsed | 1955-11-07 | 1961-10-03 | 0 | Details |
| US3001895A | Semiconductor devices and method of making same | Expired / Lapsed | 1957-06-06 | 1961-09-26 | 1 | Details |
| US3000768A | Semiconductor device with controlled zone thickness | Expired / Lapsed | 1959-05-28 | 1961-09-19 | 0 | Details |
| US3001140A | Data transmission | Expired / Lapsed | 1957-11-29 | 1961-09-19 | 0 | Details |
| US2997692A | Binary comparator | Expired / Lapsed | 1959-01-30 | 1961-08-22 | 0 | Details |
| US2997361A | Selective electrostatic character printing | Expired / Lapsed | 1958-06-25 | 1961-08-22 | 0 | Details |
| US2997693A | Electrostatic storage system | Expired / Lapsed | 1957-12-31 | 1961-08-22 | 0 | Details |
| US2997696A | Magnetic core device | Expired / Lapsed | 1957-10-24 | 1961-08-22 | 0 | Details |
| US2996918A | Junction transistor thermostat | Expired / Lapsed | 1955-12-27 | 1961-08-22 | 0 | Details |
| US2995667A | Transmission line driver | Expired / Lapsed | 1957-12-23 | 1961-08-08 | 0 | Details |
| US2995727A | Means for comparing wave shapes | Expired / Lapsed | 1957-10-29 | 1961-08-08 | 0 | Details |
| US2993999A | Photoelectric sensing | Expired / Lapsed | 1959-10-30 | 1961-07-25 | 0 | Details |
| US2994029A | Current supply apparatus | Expired / Lapsed | 1958-06-10 | 1961-07-25 | 0 | Details |
| US2993595A | Automatic sorting machine | Expired / Lapsed | 1956-04-04 | 1961-07-25 | 0 | Details |
| US2994065A | Self-sorting storage devices | Expired / Lapsed | 1956-03-14 | 1961-07-25 | 0 | Details |
| US2992413A | Data storage system | Expired / Lapsed | 1955-06-28 | 1961-07-11 | 0 | Details |
| US2990767A | Chain printer | Expired / Lapsed | 1957-12-24 | 1961-07-04 | 0 | Details |
| US2990538A | Tape to card and card to tape converter | Expired / Lapsed | 1954-11-26 | 1961-06-27 | 0 | Details |
| US2989732A | Time sequence addressing system | Expired / Lapsed | 1955-05-24 | 1961-06-20 | 0 | Details |
| US2988818A | Azimuth directional reference system | Expired / Lapsed | 1954-01-06 | 1961-06-20 | 0 | Details |
| US2988701A | Shifting registers | Expired / Lapsed | 1954-11-19 | 1961-06-13 | 0 | Details |
| US2986591A | Photovoltaic cell | Expired / Lapsed | 1955-10-17 | 1961-05-30 | 0 | Details |
| US2985763A | Electro-optical binary counter | Expired / Lapsed | 1956-01-24 | 1961-05-23 | 0 | Details |
| US2983824A | Electro-optical point shutter | Expired / Lapsed | 1955-05-06 | 1961-05-09 | 0 | Details |
| US2982176A | Information storage and retrieval system | Expired / Lapsed | 1958-11-28 | 1961-05-02 | 0 | Details |
| US2981858A | Electroluminescent decals | Expired / Lapsed | 1959-07-21 | 1961-04-25 | 0 | Details |
| US2981874A | High speed, high current transistor | Expired / Lapsed | 1957-05-31 | 1961-04-25 | 0 | Details |
| US2981940A | Communication systems | Expired / Lapsed | 1957-03-11 | 1961-04-25 | 0 | Details |
| US2979467A | Infrared stimulable phosphors | Expired / Lapsed | 1958-06-30 | 1961-04-11 | 4 | Details |
| US2979566A | Method and system for transmitting data | Expired / Lapsed | 1958-02-18 | 1961-04-11 | 0 | Details |
| US2978608A | Character synthesizing tube | Expired / Lapsed | 1959-10-02 | 1961-04-04 | 0 | Details |
| US2978666A | Fluid pressure connector for printed circuit card | Expired / Lapsed | 1957-05-27 | 1961-04-04 | 0 | Details |
| US2978678A | Data transmission system | Expired / Lapsed | 1956-02-20 | 1961-04-04 | 0 | Details |
| US2978175A | Program control system for electronic digital computers | Expired / Lapsed | 1954-02-05 | 1961-04-04 | 0 | Details |
| US2977505A | Information storage in glow discharge devices | Expired / Lapsed | 1957-10-11 | 1961-03-28 | 0 | Details |
| US2975390A | Pluggable unit | Expired / Lapsed | 1958-12-31 | 1961-03-14 | 0 | Details |
| US2975377A | Two-terminal semiconductor high frequency oscillator | Expired / Lapsed | 1958-10-13 | 1961-03-14 | 0 | Details |
| US2975407A | Erase forward | Expired / Lapsed | 1958-03-03 | 1961-03-14 | 0 | Details |
| US2975228A | Data transmission system | Expired / Lapsed | 1954-10-06 | 1961-03-14 | 0 | Details |
| US2973508A | Comparator | Expired / Lapsed | 1958-11-19 | 1961-02-28 | 0 | Details |
| US2972742A | Automatic position-reporting system | Expired / Lapsed | 1956-09-12 | 1961-02-21 | 0 | Details |
| US2972137A | Signal translating apparatus | Expired / Lapsed | 1957-11-01 | 1961-02-14 | 0 | Details |
| US2969730A | Data translation and printing | Expired / Lapsed | 1959-12-31 | 1961-01-31 | 0 | Details |
| US2969912A | Error detecting and correcting circuits | Expired / Lapsed | 1957-02-26 | 1961-01-31 | 0 | Details |
| US2969522A | Data transmission and storage system | Expired / Lapsed | 1958-06-12 | 1961-01-24 | 0 | Details |
| US2969042A | Cylinder adder | Expired / Lapsed | 1957-07-26 | 1961-01-24 | 0 | Details |
| US2968791A | Buffer storage system | Expired / Lapsed | 1956-05-21 | 1961-01-17 | 0 | Details |
| US2967664A | Electro-optical data processing system | Expired / Lapsed | 1960-03-21 | 1961-01-10 | 0 | Details |
| US2968027A | Data processing system memory controls | Expired / Lapsed | 1958-08-29 | 1961-01-10 | 0 | Details |
| US2967999A | Waveform measuring apparatus | Expired / Lapsed | 1957-11-27 | 1961-01-10 | 0 | Details |
| US2966305A | Simultaneous carry adder | Expired / Lapsed | 1957-08-16 | 1960-12-27 | 0 | Details |
| US2966664A | Magnetic core flip-flop | Expired / Lapsed | 1955-09-01 | 1960-12-27 | 0 | Details |
| US2964652A | Transistor switching circuits | Expired / Lapsed | 1956-11-15 | 1960-12-13 | 0 | Details |
| US2963411A | Process for removing shorts from p-n junctions | Expired / Lapsed | 1957-12-24 | 1960-12-06 | 0 | Details |
| US2963690A | Magnetic transducer | Expired / Lapsed | 1957-10-14 | 1960-12-06 | 0 | Details |
| US2962681A | Superconductor circuits | Expired / Lapsed | 1960-03-21 | 1960-11-29 | 0 | Details |
| US2961745A | Device for assembling magnetic core array | Expired / Lapsed | 1955-12-29 | 1960-11-29 | 0 | Details |
| US2961642A | Peak sensing circuit | Expired / Lapsed | 1957-12-31 | 1960-11-22 | 0 | Details |
| US2961645A | Magnetic transducer | Expired / Lapsed | 1957-09-10 | 1960-11-22 | 0 | Details |
| US2960683A | Data coordinator | Expired / Lapsed | 1956-06-20 | 1960-11-15 | 0 | Details |
| US2959769A | Data consolidation systems | Expired / Lapsed | 1958-12-29 | 1960-11-08 | 0 | Details |
| US2959351A | Data storage and processing machine | Expired / Lapsed | 1955-11-02 | 1960-11-08 | 0 | Details |
| US2959768A | Comparator | Expired / Lapsed | 1955-10-25 | 1960-11-08 | 0 | Details |
| US2958120A | Method of flush circuit manufacture | Expired / Lapsed | 1956-05-01 | 1960-11-01 | 0 | Details |
| US2958859A | Electrical encoding and decoding switching apparatus | Expired / Lapsed | 1955-06-01 | 1960-11-01 | 0 | Details |
| US2957626A | High-speed electronic calculator | Expired / Lapsed | 1955-11-21 | 1960-10-25 | 0 | Details |
| US2956264A | Time interval detection system | Expired / Lapsed | 1959-06-29 | 1960-10-11 | 0 | Details |
| US2955756A | Serial word checking circuit | Expired / Lapsed | 1955-12-09 | 1960-10-11 | 0 | Details |
| US2955254A | Electronic commutator | Expired / Lapsed | 1957-10-04 | 1960-10-04 | 0 | Details |
| US2954164A | Check digit monitoring and correcting circuits | Expired / Lapsed | 1955-10-14 | 1960-09-27 | 0 | Details |
| US2952010A | Magnetic recording and reproducing system | Expired / Lapsed | 1957-12-30 | 1960-09-06 | 0 | Details |
| US2952008A | Record actuated timing and checking means | Expired / Lapsed | 1957-12-26 | 1960-09-06 | 0 | Details |
| US2951534A | High speed punch | Expired / Lapsed | 1957-03-01 | 1960-09-06 | 0 | Details |
| US2951637A | Floating decimal system | Expired / Lapsed | 1954-01-11 | 1960-09-06 | 0 | Details |
| US2951232A | Tape control circuits | Expired / Lapsed | 1955-11-21 | 1960-08-30 | 0 | Details |
| US2950052A | Analogue-to-digital precision integrator | Expired / Lapsed | 1954-12-29 | 1960-08-23 | 0 | Details |
| US2947882A | Transistor trigger circuits | Expired / Lapsed | 1957-12-30 | 1960-08-02 | 0 | Details |
| US2947865A | Impulse distributor | Expired / Lapsed | 1957-03-01 | 1960-08-02 | 0 | Details |
| US2947977A | Switch core matrix | Expired / Lapsed | 1956-06-11 | 1960-08-02 | 0 | Details |
| US2947808A | Signal translating apparatus | Expired / Lapsed | 1955-06-21 | 1960-08-02 | 0 | Details |
| US2947591A | Toll highway recorder | Expired / Lapsed | 1953-12-15 | 1960-08-02 | 0 | Details |
| US2946986A | Communications system | Expired / Lapsed | 1956-04-17 | 1960-07-26 | 0 | Details |
| US2946983A | Comparison circuits | Expired / Lapsed | 1955-11-14 | 1960-07-26 | 0 | Details |
| US2942779A | Integrating device | Expired / Lapsed | 1952-09-30 | 1960-06-28 | 0 | Details |
| US2940670A | Electronic digital computing machines | Expired / Lapsed | 1956-04-02 | 1960-06-14 | 0 | Details |
| US2939119A | Core storage matrix | Expired / Lapsed | 1957-06-24 | 1960-05-31 | 0 | Details |
| US2939124A | Magnetic core detection circuit for double punch and blank … | Expired / Lapsed | 1957-05-06 | 1960-05-31 | 0 | Details |
| US2939066A | Variable damped servomotor system | Expired / Lapsed | 1956-10-25 | 1960-05-31 | 0 | Details |
| US2939116A | Tape code translator | Expired / Lapsed | 1956-04-02 | 1960-05-31 | 0 | Details |
| US2939110A | Comparing device for employment in a record card collator o… | Expired / Lapsed | 1954-02-04 | 1960-05-31 | 0 | Details |
| US2937283A | Scanning device | Expired / Lapsed | 1957-11-25 | 1960-05-17 | 0 | Details |
| US2937240A | Self-loading hydro-dynamic bearing | Expired / Lapsed | 1957-06-18 | 1960-05-17 | 0 | Details |
| US2935626A | Transistor switching circuit | Expired / Lapsed | 1957-02-25 | 1960-05-03 | 0 | Details |
| US2933298A | Integrating accelerometer | Expired / Lapsed | 1953-11-16 | 1960-04-19 | 0 | Details |
| US2932792A | Transistor testing method | Expired / Lapsed | 1957-12-31 | 1960-04-12 | 0 | Details |
| US2932451A | Matrix storage accumulator system | Expired / Lapsed | 1955-10-31 | 1960-04-12 | 0 | Details |
| US2932449A | Integrating apparatus | Expired / Lapsed | 1954-01-25 | 1960-04-12 | 0 | Details |
| US2930908A | Superconductor switch | Expired / Lapsed | 1957-12-26 | 1960-03-29 | 0 | Details |
| US2931023A | Digital position indicator | Expired / Lapsed | 1955-02-14 | 1960-03-29 | 0 | Details |
| US2931014A | Magnetic core buffer storage and conversion system | Expired / Lapsed | 1954-07-14 | 1960-03-29 | 0 | Details |
| US2931022A | Spot sequential character generator | Expired / Lapsed | 1954-06-16 | 1960-03-29 | 0 | Details |
| US2929050A | Double ended drive for selection lines of a core memory | Expired / Lapsed | 1955-05-27 | 1960-03-15 | 0 | Details |
| US2927432A | Hydraulic positioning device | Expired / Lapsed | 1958-03-18 | 1960-03-08 | 0 | Details |
| US2928079A | Magnetic head for recording and reading binary data | Expired / Lapsed | 1958-02-21 | 1960-03-08 | 0 | Details |
| US2927789A | Storage and feed means for a continuous web | Expired / Lapsed | 1958-01-02 | 1960-03-08 | 0 | Details |
| US2927247A | Transistor neon driver | Expired / Lapsed | 1958-06-27 | 1960-03-01 | 0 | Details |
| US2926850A | Binary adder subtracter | Expired / Lapsed | 1955-01-03 | 1960-03-01 | 0 | Details |
| US2925645A | Process for forming an insulation backed wiring panel | Expired / Lapsed | 1955-09-21 | 1960-02-23 | 0 | Details |
| US2925218A | Instruction controlled shifting device | Expired / Lapsed | 1954-11-15 | 1960-02-16 | 0 | Details |
| US2922231A | Magnetic transducer | Expired / Lapsed | 1956-04-26 | 1960-01-26 | 0 | Details |
| US2922985A | Shifting register and storage device therefor | Expired / Lapsed | 1953-03-05 | 1960-01-26 | 0 | Details |
| US2920822A | Subtraction circuits utilizing electrical delay lines | Expired / Lapsed | 1958-09-16 | 1960-01-12 | 0 | Details |
| US2921296A | Deskewing system | Expired / Lapsed | 1958-06-30 | 1960-01-12 | 0 | Details |
| US2920818A | Dynamic evaluator | Expired / Lapsed | 1954-12-31 | 1960-01-12 | 0 | Details |
| US2919426A | Character reader | Expired / Lapsed | 1958-03-12 | 1959-12-29 | 0 | Details |
| US2919008A | Ribbon lift mechanism | Expired / Lapsed | 1957-12-27 | 1959-12-29 | 0 | Details |
| US2918865A | Chain printer timer | Expired / Lapsed | 1957-12-27 | 1959-12-29 | 0 | Details |
| US2919002A | Selection mechanism for a single printing element typewriter | Expired / Lapsed | 1957-04-19 | 1959-12-29 | 0 | Details |
| US2919429A | Data transfer mechanism | Expired / Lapsed | 1954-10-25 | 1959-12-29 | 0 | Details |
| US2919425A | Reading apparatus | Expired / Lapsed | 1953-12-30 | 1959-12-29 | 0 | Details |
| US2916205A | Pressure responsive mechanism | Expired / Lapsed | 1956-10-19 | 1959-12-08 | 0 | Details |
| US2915643A | Light gun assembly | Expired / Lapsed | 1956-06-21 | 1959-12-01 | 0 | Details |
| US2914754A | Memory system | Expired / Lapsed | 1957-02-26 | 1959-11-24 | 0 | Details |
| US2914728A | Hall effect probe | Expired / Lapsed | 1956-10-02 | 1959-11-24 | 0 | Details |
| US2914248A | Program control for a data processing machine | Expired / Lapsed | 1956-03-07 | 1959-11-24 | 0 | Details |
| US2913171A | Sorter-collator for tape recorded data | Expired / Lapsed | 1954-12-09 | 1959-11-17 | 0 | Details |
| US2909972A | Display apparatus employing electro-optical devices | Expired / Lapsed | 1958-09-15 | 1959-10-27 | 0 | Details |
| US2910673A | Core assembly | Expired / Lapsed | 1958-05-27 | 1959-10-27 | 0 | Details |
| US2910634A | Semiconductor device | Expired / Lapsed | 1957-05-31 | 1959-10-27 | 0 | Details |
| US2909996A | High speed printing mechanism | Expired / Lapsed | 1957-02-13 | 1959-10-27 | 0 | Details |
| US2909995A | Print checking circuit for accounting machines | Expired / Lapsed | 1956-12-31 | 1959-10-27 | 0 | Details |
| US2910648A | Low voltage indicator | Expired / Lapsed | 1956-12-31 | 1959-10-27 | 0 | Details |
| US2910235A | Drive and bit count control means for data handling matrix | Expired / Lapsed | 1956-10-15 | 1959-10-27 | 0 | Details |
| US2909994A | Wire printer | Expired / Lapsed | 1954-12-30 | 1959-10-27 | 0 | Details |
| US2909971A | Printing machine | Expired / Lapsed | 1954-03-30 | 1959-10-27 | 0 | Details |
| US2910236A | Calculator program system | Expired / Lapsed | 1954-01-15 | 1959-10-27 | 0 | Details |
| US2907680A | Stress relieved thin magnetic films | Expired / Lapsed | 1958-01-23 | 1959-10-06 | 2 | Details |
| US2907937A | Digital servo system | Expired / Lapsed | 1957-12-26 | 1959-10-06 | 0 | Details |
| US2907926A | Electrical circuit assembly | Expired / Lapsed | 1955-12-09 | 1959-10-06 | 0 | Details |
| US2907270A | Wire printer | Expired / Lapsed | 1954-12-31 | 1959-10-06 | 0 | Details |
| US2907009A | Magnetic head commutator | Expired / Lapsed | 1956-07-05 | 1959-09-29 | 0 | Details |
| US2906871A | Diode clipping circuit | Expired / Lapsed | 1954-11-10 | 1959-09-29 | 0 | Details |
| US2906819A | Data reading machine | Expired / Lapsed | 1954-07-06 | 1959-09-29 | 0 | Details |
| US2904070A | Multi-port selector | Expired / Lapsed | 1955-06-06 | 1959-09-15 | 0 | Details |
| US2903604A | Multistable circuit | Expired / Lapsed | 1955-01-03 | 1959-09-08 | 0 | Details |
| US2901927A | Automatic machine tool | Expired / Lapsed | 1957-12-27 | 1959-09-01 | 0 | Details |
| US2902136A | Ribbon mechanism | Expired / Lapsed | 1957-12-20 | 1959-09-01 | 0 | Details |
| US2902132A | Single element print head | Expired / Lapsed | 1955-12-30 | 1959-09-01 | 0 | Details |
| US2902677A | Magnetic core current driver | Expired / Lapsed | 1954-07-02 | 1959-09-01 | 0 | Details |
| US2902676A | Non-destructive sensing of magnetic cores | Expired / Lapsed | 1953-10-01 | 1959-09-01 | 0 | Details |
| US2901166A | Digital computer | Expired / Lapsed | 1953-02-05 | 1959-08-25 | 0 | Details |
| US2898248A | Method of fabricating germanium bodies | Expired / Lapsed | 1957-05-15 | 1959-08-04 | 1 | Details |
| US2898580A | Improved readout circuit for multistable magnetic cores | Expired / Lapsed | 1956-10-23 | 1959-08-04 | 0 | Details |
| US2898247A | Fabrication of diffused junction semi-conductor devices | Expired / Lapsed | 1955-10-24 | 1959-08-04 | 1 | Details |
| US2898041A | Instruction modifier means for electronic digital computing… | Expired / Lapsed | 1953-12-21 | 1959-08-04 | 0 | Details |
| US2895671A | Electronic digital computing machines | Expired / Lapsed | 1954-03-23 | 1959-07-21 | 0 | Details |
| US2895672A | Electronic multiplying system | Expired / Lapsed | 1954-01-15 | 1959-07-21 | 0 | Details |
| US2895106A | Tester | Expired / Lapsed | 1958-04-29 | 1959-07-14 | 0 | Details |
| US2894151A | Magnetic core inverter circuit | Expired / Lapsed | 1956-12-20 | 1959-07-07 | 0 | Details |
| US2894128A | Mono-stable multivibrator | Expired / Lapsed | 1954-12-24 | 1959-07-07 | 0 | Details |
| US2889758A | Electrophotographic printer | Expired / Lapsed | 1954-12-24 | 1959-06-09 | 0 | Details |
| US2889532A | Wiring assembly with stacked conductor cards | Expired / Lapsed | 1956-09-04 | 1959-06-02 | 0 | Details |
| US2889535A | Recognition of recorded intelligence | Expired / Lapsed | 1955-10-20 | 1959-06-02 | 0 | Details |
| US2889499A | Bistable semiconductor device | Expired / Lapsed | 1954-09-27 | 1959-06-02 | 3 | Details |
| FR1179999A | Electro-optical circuit | Expired / Lapsed | 1957-01-11 | 1959-05-29 | 0 | Details |
| US2888201A | Adder circuit | Expired / Lapsed | 1957-12-31 | 1959-05-26 | 0 | Details |
| US2888578A | Transistor emitter-follower circuits | Expired / Lapsed | 1954-09-30 | 1959-05-26 | 0 | Details |
| US2885149A | Transistor full adder | Expired / Lapsed | 1956-09-04 | 1959-05-05 | 0 | Details |
| US2884852A | Printer carriage control means | Expired / Lapsed | 1956-07-13 | 1959-05-05 | 0 | Details |
| US2884625A | Code generator | Expired / Lapsed | 1955-10-18 | 1959-04-28 | 0 | Details |
| US2884619A | Information storage system | Expired / Lapsed | 1953-09-02 | 1959-04-28 | 0 | Details |
| US2882424A | Ring circuit | Expired / Lapsed | 1954-09-30 | 1959-04-14 | 0 | Details |
| US2882423A | Ring circuit | Expired / Lapsed | 1954-09-30 | 1959-04-14 | 0 | Details |
| US2880932A | Record card accounting machine | Expired / Lapsed | 1955-05-19 | 1959-04-07 | 0 | Details |
| US2881364A | Electrical assembly housing | Expired / Lapsed | 1954-11-12 | 1959-04-07 | 0 | Details |
| US2879876A | Single element printing machine | Expired / Lapsed | 1955-11-17 | 1959-03-31 | 0 | Details |
| US2880331A | Time controlled signal discriminator circuit | Expired / Lapsed | 1954-09-30 | 1959-03-31 | 0 | Details |
| US2880392A | Digital microvolt measuring device | Expired / Lapsed | 1953-11-30 | 1959-03-31 | 0 | Details |
| US2877951A | Character sensing system | Expired / Lapsed | 1956-12-31 | 1959-03-17 | 0 | Details |
| US2878398A | Electric circuits including transistors | Expired / Lapsed | 1953-12-31 | 1959-03-17 | 0 | Details |
| US2877066A | Fluid pressurized sleeve bearing | Expired / Lapsed | 1956-09-25 | 1959-03-10 | 0 | Details |
| US2875951A | Synchronization of display means to specific microsecond in… | Expired / Lapsed | 1955-05-23 | 1959-03-03 | 0 | Details |
| US2872671A | Shaft position indicating device | Expired / Lapsed | 1956-08-09 | 1959-02-03 | 0 | Details |
| US2872666A | Data transfer and translating system | Expired / Lapsed | 1955-12-21 | 1959-02-03 | 0 | Details |
| US2872391A | Method of making plated hole printed wiring boards | Expired / Lapsed | 1955-06-28 | 1959-02-03 | 2 | Details |
| US2872110A | Flexible electronic commutator | Expired / Lapsed | 1954-01-15 | 1959-02-03 | 0 | Details |
| US2872670A | Device to manifest an unknown voltage as a numerical quanti… | Expired / Lapsed | 1952-02-07 | 1959-02-03 | 0 | Details |
| US2870348A | System for selectively energizing one of three circuits res… | Expired / Lapsed | 1957-12-16 | 1959-01-20 | 0 | Details |
| US2869965A | Electro-sensitive digital data plotter | Expired / Lapsed | 1954-12-30 | 1959-01-20 | 0 | Details |
| US2869853A | Tare correction apparatus | Expired / Lapsed | 1954-07-14 | 1959-01-20 | 0 | Details |
| US2869054A | Unipolar transistor | Expired / Lapsed | 1956-11-09 | 1959-01-13 | 0 | Details |
| US2869112A | Coincidence flux memory system | Expired / Lapsed | 1955-11-10 | 1959-01-13 | 0 | Details |
| US2868455A | Binary counter with fast carry | Expired / Lapsed | 1954-09-30 | 1959-01-13 | 0 | Details |
| US2869000A | Modified binary counter circuit | Expired / Lapsed | 1954-09-30 | 1959-01-13 | 0 | Details |
| US2869111A | Electron beam switch tube operation of a ferroelectric matr… | Expired / Lapsed | 1953-11-17 | 1959-01-13 | 0 | Details |
| US2866176A | Mechanical information storage matrix | Expired / Lapsed | 1956-01-05 | 1958-12-23 | 0 | Details |
| US2864007A | Transistor trigger circuit | Expired / Lapsed | 1957-12-04 | 1958-12-09 | 0 | Details |
| US2863549A | Subcycle control for serial-parallel printer | Expired / Lapsed | 1956-05-22 | 1958-12-09 | 0 | Details |
| US2862781A | Recording support devices | Expired / Lapsed | 1954-01-27 | 1958-12-02 | 0 | Details |
| US2861258A | Transistor amplifier circuit | Expired / Lapsed | 1954-09-30 | 1958-11-18 | 0 | Details |
| US2861200A | Trigger circuits employing junction transistors | Expired / Lapsed | 1954-09-30 | 1958-11-18 | 0 | Details |
| US2859673A | Electrophotographic printer | Expired / Lapsed | 1954-03-29 | 1958-11-11 | 0 | Details |
| US2858888A | Relay storage and readout device | Expired / Lapsed | 1956-01-26 | 1958-11-04 | 0 | Details |
| US2858730A | Germanium crystallographic orientation | Expired / Lapsed | 1955-12-30 | 1958-11-04 | 2 | Details |
| US2857290A | Electroferrographic printing process and apparatus therefor | Expired / Lapsed | 1955-09-21 | 1958-10-21 | 2 | Details |
| US2855513A | Clipping circuit with clipping level automatically set by a… | Expired / Lapsed | 1955-11-30 | 1958-10-07 | 0 | Details |
| US2852761A | Magnetic recording and reading apparatus | Expired / Lapsed | 1955-01-10 | 1958-09-16 | 0 | Details |
| US2851660A | Circuit testing apparatus | Expired / Lapsed | 1953-10-26 | 1958-09-09 | 0 | Details |
| US2849752A | Machine for embossing thermoplastic workpiece | Expired / Lapsed | 1956-12-17 | 1958-09-02 | 0 | Details |
| US2850649A | Detector circuit | Expired / Lapsed | 1955-12-29 | 1958-09-02 | 0 | Details |
| US2850647A | "exclusive or" logical circuits | Expired / Lapsed | 1954-12-29 | 1958-09-02 | 0 | Details |
| US2850240A | Rotational displacement indicating system | Expired / Lapsed | 1952-10-28 | 1958-09-02 | 0 | Details |
| US2848166A | Counter | Expired / Lapsed | 1955-11-03 | 1958-08-19 | 0 | Details |
| US2848608A | Electronic ring circuit | Expired / Lapsed | 1954-12-08 | 1958-08-19 | 0 | Details |
| US2847529A | Electrical contact assembly | Expired / Lapsed | 1956-12-31 | 1958-08-12 | 0 | Details |
| US2847565A | Pulse gap detector | Expired / Lapsed | 1954-12-31 | 1958-08-12 | 0 | Details |
| US2846007A | Automatic error deletion for paper tape | Expired / Lapsed | 1955-12-27 | 1958-08-05 | 0 | Details |
| US2846592A | Temperature compensated semiconductor devices | Expired / Lapsed | 1955-05-20 | 1958-08-05 | 0 | Details |
| US2842682A | Reversible shift register | Expired / Lapsed | 1956-09-04 | 1958-07-08 | 0 | Details |
| US2842755A | Ternary magnetic storage device | Expired / Lapsed | 1955-08-25 | 1958-07-08 | 0 | Details |
| US2842668A | High frequency transistor oscillator | Expired / Lapsed | 1955-05-25 | 1958-07-08 | 0 | Details |
| US2839740A | Analog-to-digital converter | Expired / Lapsed | 1954-01-27 | 1958-06-17 | 0 | Details |
| US2838602A | Character reader | Expired / Lapsed | 1953-07-22 | 1958-06-10 | 0 | Details |
| US2837641A | Radio frequency actuated transfer relay | Expired / Lapsed | 1953-10-01 | 1958-06-03 | 0 | Details |
| US2834544A | Accumulator carry means | Expired / Lapsed | 1956-12-24 | 1958-05-13 | 0 | Details |
| US2834831A | Data recording means | Expired / Lapsed | 1950-12-19 | 1958-05-13 | 0 | Details |
| US2832063A | System for recording punched card data on magnetic tape | Expired / Lapsed | 1953-12-31 | 1958-04-22 | 0 | Details |
| US2831131A | Linear-motor paper feed | Expired / Lapsed | 1955-12-20 | 1958-04-15 | 0 | Details |
| US2826359A | Checking circuit | Expired / Lapsed | 1954-10-27 | 1958-03-11 | 0 | Details |
| US2826139A | Printer with shifting printing means | Expired / Lapsed | 1954-08-25 | 1958-03-11 | 0 | Details |
| US2825889A | Switching network | Expired / Lapsed | 1955-01-03 | 1958-03-04 | 0 | Details |
| US2823368A | Data storage matrix | Expired / Lapsed | 1954-07-14 | 1958-02-11 | 0 | Details |
| US2820956A | Magnetic printing machine | Expired / Lapsed | 1956-04-09 | 1958-01-21 | 0 | Details |
| US2819457A | Timing and clocking circuits | Expired / Lapsed | 1954-02-08 | 1958-01-07 | 0 | Details |
| US2818800A | Wire printer | Expired / Lapsed | 1953-12-23 | 1958-01-07 | 0 | Details |
| US2818322A | Sorter for tape recorded data | Expired / Lapsed | 1953-05-26 | 1957-12-31 | 0 | Details |
| US2816050A | Method of forming monocrystals | Expired / Lapsed | 1953-12-18 | 1957-12-10 | 2 | Details |
| US2815488A | Non-linear capacitance or inductance switching, amplifying,… | Expired / Lapsed | 1954-04-28 | 1957-12-03 | 0 | Details |
| US2814794A | Non-destructive sensing of magnetic cores | Expired / Lapsed | 1955-08-17 | 1957-11-26 | 0 | Details |
| US2814031A | Magnetic storage keyboard | Expired / Lapsed | 1955-08-26 | 1957-11-19 | 0 | Details |
| US2812485A | Tachometer generator damped servo system | Expired / Lapsed | 1954-10-05 | 1957-11-05 | 0 | Details |
| US2812474A | Control circuit employing transistors | Expired / Lapsed | 1954-09-30 | 1957-11-05 | 0 | Details |
| US2807704A | Xerographic image fixing apparatus | Expired / Lapsed | 1956-06-14 | 1957-09-24 | 0 | Details |
| US2807703A | Xerographic image fixing apparatus | Expired / Lapsed | 1956-06-14 | 1957-09-24 | 0 | Details |
| US2807190A | Optical unit for use in a record controlled machine | Expired / Lapsed | 1956-04-27 | 1957-09-24 | 0 | Details |
| US2807419A | Pre-set recycling glow transfer counter | Expired / Lapsed | 1954-05-17 | 1957-09-24 | 0 | Details |
| US2807233A | Electrophotographic printing machine | Expired / Lapsed | 1954-03-29 | 1957-09-24 | 0 | Details |
| US2806986A | High performance servo system | Expired / Lapsed | 1954-12-31 | 1957-09-17 | 0 | Details |
| US2803177A | Apparatus and method for xerographic printing | Expired / Lapsed | 1953-12-31 | 1957-08-20 | 0 | Details |
| US2801334A | Dynamic storage circuit | Expired / Lapsed | 1953-04-06 | 1957-07-30 | 0 | Details |
| US2801343A | Document reading device | Expired / Lapsed | 1952-12-05 | 1957-07-30 | 0 | Details |
| US2800539A | Program device | Expired / Lapsed | 1954-12-06 | 1957-07-23 | 0 | Details |
| US2798554A | Data transfer apparatus | Expired / Lapsed | 1955-12-30 | 1957-07-09 | 0 | Details |
| US2798199A | Resistance testing machine | Expired / Lapsed | 1954-04-19 | 1957-07-02 | 0 | Details |
| US2797179A | Process of forming a molded laminate | Expired / Lapsed | 1953-12-21 | 1957-06-25 | 0 | Details |
| US2796634A | Reverse forming process for making shaped articles from pla… | Expired / Lapsed | 1953-12-21 | 1957-06-25 | 0 | Details |
| US2794081A | Circuit selector | Expired / Lapsed | 1955-01-12 | 1957-05-28 | 0 | Details |
| US2792779A | Vibrating printing means | Expired / Lapsed | 1954-06-21 | 1957-05-21 | 0 | Details |
| US2792991A | Electronic commutator for calculators | Expired / Lapsed | 1953-11-23 | 1957-05-21 | 0 | Details |
| US2792217A | Tape feed mechanism | Expired / Lapsed | 1954-07-13 | 1957-05-14 | 0 | Details |
| US2792174A | Binary code converter | Expired / Lapsed | 1953-12-21 | 1957-05-14 | 0 | Details |
| US2790076A | Electronic storage device | Expired / Lapsed | 1953-11-05 | 1957-04-23 | 0 | Details |
| US2789766A | Record controlled machine | Expired / Lapsed | 1953-10-16 | 1957-04-23 | 0 | Details |
| US2785628A | Wire printer | Expired / Lapsed | 1954-12-30 | 1957-03-19 | 0 | Details |
| US2782989A | Record sensing apparatus | Expired / Lapsed | 1953-12-30 | 1957-02-26 | 0 | Details |
| US2782397A | Piezoelectric interrogation of ferroelectric condensers | Expired / Lapsed | 1953-10-01 | 1957-02-19 | 0 | Details |
| US2779929A | Self-locking plug connector | Expired / Lapsed | 1953-11-02 | 1957-01-29 | 0 | Details |
| US2779007A | Plugboard contactor | Expired / Lapsed | 1951-12-21 | 1957-01-22 | 0 | Details |
| US2778005A | Core matrix | Expired / Lapsed | 1955-01-20 | 1957-01-15 | 0 | Details |
| US2774429A | Magnetic core converter and storage unit | Expired / Lapsed | 1953-05-28 | 1956-12-18 | 0 | Details |
| US2774868A | Binary-decade counter | Expired / Lapsed | 1951-12-21 | 1956-12-18 | 0 | Details |
| US2773444A | Magnetic core storage for business machines | Expired / Lapsed | 1953-11-27 | 1956-12-11 | 0 | Details |
| US2772410A | Transistor indicator circuit | Expired / Lapsed | 1954-09-30 | 1956-11-27 | 0 | Details |
| US2772370A | Binary trigger and counter circuits employing magnetic memo… | Expired / Lapsed | 1953-12-31 | 1956-11-27 | 0 | Details |
| US2771278A | Cooling apparatus | Expired / Lapsed | 1954-02-23 | 1956-11-20 | 0 | Details |
| US2771593A | Error position indicator for target manifestation device | Expired / Lapsed | 1954-01-20 | 1956-11-20 | 0 | Details |
| US2771025A | Print impression mechanism | Expired / Lapsed | 1953-11-02 | 1956-11-20 | 0 | Details |
| US2770797A | Data storage apparatus | Expired / Lapsed | 1951-12-31 | 1956-11-13 | 0 | Details |
| US2770725A | Binary-decade counter | Expired / Lapsed | 1951-12-21 | 1956-11-13 | 0 | Details |
| US2766377A | Electronic commutator | Expired / Lapsed | 1952-11-18 | 1956-10-09 | 0 | Details |
| US2764639A | Indicia tape controlling apparatus | Expired / Lapsed | 1951-11-07 | 1956-09-25 | 0 | Details |
| US2763851A | Gated diode transfer circuits | Expired / Lapsed | 1953-08-25 | 1956-09-18 | 0 | Details |
| US2762921A | Binary trigger circuit | Expired / Lapsed | 1953-12-31 | 1956-09-11 | 0 | Details |
| US2757775A | Single printing element typewriter | Expired / Lapsed | 1953-01-19 | 1956-08-07 | 0 | Details |
| US2755536A | Method of producing transistors having substantially unifor… | Expired / Lapsed | 1951-11-07 | 1956-07-24 | 0 | Details |
| US2754360A | Character synthesizer | Expired / Lapsed | 1951-12-24 | 1956-07-10 | 0 | Details |
| FR1119767A | Column shift device with counting | Expired / Lapsed | 1955-01-10 | 1956-06-25 | 0 | Details |
| FR1119708A | Logic circuits using junction transistors | Expired / Lapsed | 1954-12-15 | 1956-06-22 | 0 | Details |
| US2750580A | Intermediate magnetic core storage | Expired / Lapsed | 1953-01-02 | 1956-06-12 | 0 | Details |
| US2749985A | Typewriting and code perforating machine | Expired / Lapsed | 1951-12-21 | 1956-06-12 | 0 | Details |
| US2750532A | Cathode-ray devices, particularly for electronic computers | Expired / Lapsed | 1948-06-03 | 1956-06-12 | 0 | Details |
| US2745956A | Diode protection circuit | Expired / Lapsed | 1951-12-31 | 1956-05-15 | 0 | Details |
| US2745599A | Electronic multiplier | Expired / Lapsed | 1950-03-03 | 1956-05-15 | 0 | Details |
| FR1116599A | Blocking circuits | Expired / Lapsed | 1954-12-28 | 1956-05-09 | 0 | Details |
| US2741960A | Record controlled printer | Expired / Lapsed | 1954-12-29 | 1956-04-17 | 0 | Details |
| FR1114472A | Circuit tester | Expired / Lapsed | 1954-10-19 | 1956-04-12 | 0 | Details |
| US2741312A | Indicia-controlled record perforating machine | Expired / Lapsed | 1951-09-18 | 1956-04-10 | 0 | Details |
| US2740949A | Multidimensional magnetic memory systems | Expired / Lapsed | 1953-08-25 | 1956-04-03 | 0 | Details |
| US2738499A | Apparatus for identifying line traces | Expired / Lapsed | 1953-06-22 | 1956-03-13 | 0 | Details |
| US2731200A | Document sensing device | Expired / Lapsed | 1954-10-05 | 1956-01-17 | 0 | Details |
| US2731196A | Self-checking number punch | Expired / Lapsed | 1951-11-14 | 1956-01-17 | 0 | Details |
| US2731201A | Electronic counter | Expired / Lapsed | 1950-12-21 | 1956-01-17 | 0 | Details |
| US2730655A | Gas tube counter | Expired / Lapsed | 1953-03-12 | 1956-01-10 | 0 | Details |
| US2726940A | Xerographic printer | Expired / Lapsed | 1954-11-03 | 1955-12-13 | 2 | Details |
| US2724061A | Single transistor binary trigger | Expired / Lapsed | 1954-04-28 | 1955-11-15 | 0 | Details |
| US2720642A | Flashtube ignition circuit for record controlled machines | Expired / Lapsed | 1951-05-26 | 1955-10-11 | 0 | Details |
| US2718356A | Data conversion system | Expired / Lapsed | 1952-04-29 | 1955-09-20 | 0 | Details |
| US2717686A | Word writing typewriter | Expired / Lapsed | 1952-11-05 | 1955-09-13 | 0 | Details |
| US2717733A | Typewriter controlled calculator | Expired / Lapsed | 1951-08-15 | 1955-09-13 | 0 | Details |
| US2717994A | Measuring and indicating system | Expired / Lapsed | 1951-05-26 | 1955-09-13 | 0 | Details |
| US2714841A | Photographic recorder | Expired / Lapsed | 1950-12-30 | 1955-08-09 | 0 | Details |
| US2709757A | Eerroresonant flip-flops | Expired / Lapsed | 1953-08-25 | 1955-05-31 | 0 | Details |
| US2708267A | Record conversion system | Expired / Lapsed | 1953-12-31 | 1955-05-10 | 0 | Details |
| US2705790A | Spin echo technique and apparatus | Expired / Lapsed | 1954-01-18 | 1955-04-05 | 0 | Details |
| US2703202A | Electronic binary algebraic accumulator | Expired / Lapsed | 1950-03-21 | 1955-03-01 | 0 | Details |
| US2703201A | Electronic divider | Expired / Lapsed | 1950-03-03 | 1955-03-01 | 0 | Details |
| FR1086430A | Electronic counter | Expired / Lapsed | 1953-07-20 | 1955-02-11 | 0 | Details |
| US2700756A | Number comparing device for accounting or similar machines | Expired / Lapsed | 1953-10-14 | 1955-01-25 | 0 | Details |
| US2700750A | Measuring and indicating system | Expired / Lapsed | 1952-04-25 | 1955-01-25 | 0 | Details |
| US2700502A | Multidigit shifting device | Expired / Lapsed | 1952-03-27 | 1955-01-25 | 0 | Details |
| US2700738A | Delay-line end cell | Expired / Lapsed | 1951-05-05 | 1955-01-25 | 0 | Details |
| US2700703A | Magnetic reproducer | Expired / Lapsed | 1950-12-29 | 1955-01-25 | 0 | Details |
| US2700147A | Spin echo information storage | Expired / Lapsed | 1953-10-07 | 1955-01-18 | 0 | Details |
| US2697649A | Card to film and film to card machine | Expired / Lapsed | 1949-04-19 | 1954-12-21 | 0 | Details |
| US2696420A | Bipolar magnetic recorder | Expired / Lapsed | 1950-12-14 | 1954-12-07 | 0 | Details |
| US2695993A | Magnetic core logical circuits | Expired / Lapsed | 1953-07-30 | 1954-11-30 | 0 | Details |
| US2695992A | Peak sensing circuit | Expired / Lapsed | 1951-12-21 | 1954-11-30 | 0 | Details |
| FR1078431A | Displacement control device for magnetic drum calculators | Expired / Lapsed | 1952-12-30 | 1954-11-18 | 0 | Details |
| US2690300A | Document sensing device | Expired / Lapsed | 1951-10-20 | 1954-09-28 | 0 | Details |
| US2690507A | Electronic multiplier | Expired / Lapsed | 1950-12-27 | 1954-09-28 | 0 | Details |
| US2687253A | Photocell testing circuit | Expired / Lapsed | 1952-10-31 | 1954-08-24 | 0 | Details |
| US2687086A | Record controlled line printing machine | Expired / Lapsed | 1949-02-03 | 1954-08-24 | 0 | Details |
| US2685049A | Coincidence circuit | Expired / Lapsed | 1951-10-31 | 1954-07-27 | 0 | Details |
| US2684746A | Continuous form feeding device | Expired / Lapsed | 1951-06-06 | 1954-07-27 | 0 | Details |
| US2682043A | Character sensing and analyzing system | Expired / Lapsed | 1951-12-27 | 1954-06-22 | 0 | Details |
| US2673032A | Data storage, read-out, and comparison device | Expired / Lapsed | 1951-10-06 | 1954-03-23 | 0 | Details |
| US2672287A | Record strip positioning device | Expired / Lapsed | 1951-04-11 | 1954-03-16 | 0 | Details |
| US2672283A | Electronic multiplier | Expired / Lapsed | 1948-09-03 | 1954-03-16 | 0 | Details |
| US2666150A | Crystal tetrode | Expired / Lapsed | 1950-05-04 | 1954-01-12 | 0 | Details |
| US2658681A | Electronic calculator | Expired / Lapsed | 1948-07-09 | 1953-11-10 | 0 | Details |
| US2654812A | Alphabetic keyboard controller | Expired / Lapsed | 1951-07-02 | 1953-10-06 | 0 | Details |
| US2651728A | Semiconductor trigger circuit | Expired / Lapsed | 1951-07-02 | 1953-09-08 | 0 | Details |
| US2651204A | Automatic pressure measuring and indicating system | Expired / Lapsed | 1950-03-09 | 1953-09-08 | 0 | Details |
| US2649513A | Distributor and method for making the same | Expired / Lapsed | 1949-03-08 | 1953-08-18 | 0 | Details |
| US2647995A | Trigger circuit | Expired / Lapsed | 1950-12-07 | 1953-08-04 | 0 | Details |
| US2647360A | Electric time system with electronic self-regulation | Expired / Lapsed | 1949-06-28 | 1953-08-04 | 0 | Details |
| US2641976A | Photographic color recording machine | Expired / Lapsed | 1949-08-13 | 1953-06-16 | 0 | Details |
| US2641706A | Controllable multivibrator circuit | Expired / Lapsed | 1949-06-23 | 1953-06-09 | 0 | Details |
| US2641407A | Electronic multiplier | Expired / Lapsed | 1949-06-18 | 1953-06-09 | 0 | Details |
| US2637763A | Pluggable support for electron tube and circuit | Expired / Lapsed | 1948-07-09 | 1953-05-05 | 0 | Details |
| US2636672A | Selective sequence electronic calculator | Expired / Lapsed | 1949-01-19 | 1953-04-28 | 0 | Details |
| US2628310A | Counter circuits | Expired / Lapsed | 1951-12-31 | 1953-02-10 | 0 | Details |
| US2628309A | Electronic storage device | Expired / Lapsed | 1951-12-31 | 1953-02-10 | 0 | Details |
| US2624511A | Record perforation analyzing mechanism | Expired / Lapsed | 1951-09-13 | 1953-01-06 | 0 | Details |
| US2624774A | Plugboard contactor | Expired / Lapsed | 1948-12-29 | 1953-01-06 | 0 | Details |
| US2624508A | Electronic dividing and multiplying apparatus | Expired / Lapsed | 1946-10-22 | 1953-01-06 | 0 | Details |
| US2624507A | Electronic calculating machine | Expired / Lapsed | 1945-09-27 | 1953-01-06 | 0 | Details |
| US2623171A | Electronic divider | Expired / Lapsed | 1950-12-27 | 1952-12-23 | 0 | Details |
| US2623115A | Electronic multiplier | Expired / Lapsed | 1950-12-27 | 1952-12-23 | 0 | Details |
| US2623170A | Trigger circuit chain | Expired / Lapsed | 1950-08-03 | 1952-12-23 | 0 | Details |
| US2620978A | Sensing mechanism | Expired / Lapsed | 1951-06-02 | 1952-12-09 | 0 | Details |
| US2620878A | Record controlled recording apparatus | Expired / Lapsed | 1948-09-10 | 1952-12-09 | 0 | Details |
| US2618386A | Record card sorting device | Expired / Lapsed | 1950-01-10 | 1952-11-18 | 0 | Details |
| US2616994A | Rotary switch | Expired / Lapsed | 1948-05-06 | 1952-11-04 | 0 | Details |
| US2617048A | Photoelectric inspection device | Expired / Lapsed | 1948-01-09 | 1952-11-04 | 0 | Details |
| US2616626A | Calculator | Expired / Lapsed | 1945-02-08 | 1952-11-04 | 0 | Details |
| US2616624A | Calculator | Expired / Lapsed | 1945-02-08 | 1952-11-04 | 0 | Details |
| US2613287A | Cross connecting board | Expired / Lapsed | 1948-10-27 | 1952-10-07 | 0 | Details |
| US2609050A | Magnetic tape controlled punch | Expired / Lapsed | 1947-12-06 | 1952-09-02 | 0 | Details |
| US2605871A | Fastening device | Expired / Lapsed | 1949-03-03 | 1952-08-05 | 0 | Details |
| US2606244A | Data receiving and retaining mechanism | Expired / Lapsed | 1948-03-30 | 1952-08-05 | 0 | Details |
| US2604262A | Multiplying and dividing means | Expired / Lapsed | 1949-01-19 | 1952-07-22 | 0 | Details |
| US2602545A | Data comparing apparatus | Expired / Lapsed | 1947-12-30 | 1952-07-08 | 0 | Details |
| US2602544A | Record sorting machine | Expired / Lapsed | 1945-06-30 | 1952-07-08 | 0 | Details |
| US2598516A | Linear variation of oscillator frequency | Expired / Lapsed | 1949-08-10 | 1952-05-27 | 0 | Details |
| US2595889A | Perforated-tape control of highspeed tabulating-card punches | Expired / Lapsed | 1945-10-24 | 1952-05-06 | 0 | Details |
| US2594748A | Control panel for accounting machines | Expired / Lapsed | 1949-10-29 | 1952-04-29 | 0 | Details |
| US2594737A | Control panel for accounting machines | Expired / Lapsed | 1949-09-29 | 1952-04-29 | 0 | Details |
| US2594742A | Two source binary-decade counter | Expired / Lapsed | 1949-01-12 | 1952-04-29 | 0 | Details |
| US2593371A | Electrically operated stenographic machine | Expired / Lapsed | 1949-07-26 | 1952-04-15 | 0 | Details |
| US2588049A | Comparing device | Expired / Lapsed | 1950-10-28 | 1952-03-04 | 0 | Details |
| US2587979A | Electronic system | Expired / Lapsed | 1948-04-23 | 1952-03-04 | 0 | Details |
| US2584811A | Electronic counting circuit | Expired / Lapsed | 1946-03-13 | 1952-02-05 | 0 | Details |
| US2580771A | Stepping register | Expired / Lapsed | 1950-11-28 | 1952-01-01 | 0 | Details |
| US2580870A | Accumulator | Expired / Lapsed | 1949-11-25 | 1952-01-01 | 0 | Details |
| US2580768A | Data look-up apparatus for computing or other machines | Expired / Lapsed | 1947-08-14 | 1952-01-01 | 0 | Details |
| US2580740A | Accounting apparatus | Expired / Lapsed | 1940-01-20 | 1952-01-01 | 0 | Details |
| US2577075A | Binary-decade counter | Expired / Lapsed | 1949-01-21 | 1951-12-04 | 0 | Details |
| US2573356A | Accounting machine for comparing totals on two accumulators | Expired / Lapsed | 1950-09-30 | 1951-10-30 | 0 | Details |
| US2573317A | Consecutive blank column detector | Expired / Lapsed | 1950-07-13 | 1951-10-30 | 0 | Details |
| US2569830A | Accounting machine with means for handling positive and neg… | Expired / Lapsed | 1950-03-04 | 1951-10-02 | 0 | Details |
| US2569840A | Record feeding and recording apparatus | Expired / Lapsed | 1949-09-16 | 1951-10-02 | 0 | Details |
| US2569827A | Polarity pulsing of triggers | Expired / Lapsed | 1948-12-29 | 1951-10-02 | 0 | Details |
| US2566931A | Record card punching machine | Expired / Lapsed | 1948-11-23 | 1951-09-04 | 0 | Details |
| US2566971A | Remote control apparatus for typewriting machines | Expired / Lapsed | 1948-06-04 | 1951-09-04 | 0 | Details |
| US2566947A | Electrical multiplying and dividing machine | Expired / Lapsed | 1948-01-16 | 1951-09-04 | 0 | Details |
| US2566944A | Typesetting means in record controlled printing machines | Expired / Lapsed | 1947-09-19 | 1951-09-04 | 0 | Details |
| US2562530A | Trigger circuits | Expired / Lapsed | 1948-12-29 | 1951-07-31 | 0 | Details |
| US2562591A | Electronic counting circuit | Expired / Lapsed | 1947-12-05 | 1951-07-31 | 0 | Details |
| US2559627A | Mark tester | Expired / Lapsed | 1948-03-12 | 1951-07-10 | 0 | Details |
| US2554707A | Printing and punching device | Expired / Lapsed | 1947-11-24 | 1951-05-29 | 0 | Details |
| US2553170A | Pattern component emitter | Expired / Lapsed | 1948-04-27 | 1951-05-15 | 0 | Details |
| US2551104A | Asymmetrical trigger circuit | Expired / Lapsed | 1949-01-12 | 1951-05-01 | 0 | Details |
| US2551103A | Electronic trigger | Expired / Lapsed | 1948-08-24 | 1951-05-01 | 0 | Details |
| US2551119A | Electronic commutator | Expired / Lapsed | 1948-07-09 | 1951-05-01 | 0 | Details |
| US2547482A | Wire contact storage unit | Expired / Lapsed | 1949-06-21 | 1951-04-03 | 0 | Details |
| US2547457A | Drive means for reciprocable type bars | Expired / Lapsed | 1948-02-04 | 1951-04-03 | 0 | Details |
| US2543899A | Keyboard | Expired / Lapsed | 1945-09-21 | 1951-03-06 | 0 | Details |
| US2540024A | Decade counter | Expired / Lapsed | 1948-11-17 | 1951-01-30 | 0 | Details |
| US2540025A | Neutralized trigger circuit | Expired / Lapsed | 1948-11-17 | 1951-01-30 | 0 | Details |
| US2540030A | Selectively controlled recording apparatus | Expired / Lapsed | 1948-05-12 | 1951-01-30 | 0 | Details |
| US2540022A | Dual coil electric relay | Expired / Lapsed | 1948-03-03 | 1951-01-30 | 0 | Details |
| US2536916A | Electronic counting system | Expired / Lapsed | 1945-12-21 | 1951-01-02 | 0 | Details |
| US2536955A | Electronic accounting machine | Expired / Lapsed | 1944-12-27 | 1951-01-02 | 0 | Details |
| US2524154A | Electrical trigger | Expired / Lapsed | 1949-01-05 | 1950-10-03 | 0 | Details |
| US2524134A | Bucking trigger circuit | Expired / Lapsed | 1948-07-09 | 1950-10-03 | 0 | Details |
| US2524123A | Electronic system | Expired / Lapsed | 1945-03-23 | 1950-10-03 | 0 | Details |
| US2521350A | Electronic counter | Expired / Lapsed | 1947-11-24 | 1950-09-05 | 0 | Details |
| US2521353A | Transmitter | Expired / Lapsed | 1945-11-27 | 1950-09-05 | 0 | Details |
| US2514054A | Comparing mechanism | Expired / Lapsed | 1948-05-06 | 1950-07-04 | 0 | Details |
| US2514031A | Record perforation analyzing mechanism | Expired / Lapsed | 1946-06-18 | 1950-07-04 | 0 | Details |
| US2514035A | Electrionic accounting apparatus | Expired / Lapsed | 1943-12-27 | 1950-07-04 | 0 | Details |
| US2511996A | Electric comparing mechanism | Expired / Lapsed | 1947-02-07 | 1950-06-20 | 0 | Details |
| US2510552A | Pneumatic record sensing device | Expired / Lapsed | 1948-01-29 | 1950-06-06 | 0 | Details |
| US2506439A | Electronic trigger | Expired / Lapsed | 1948-12-29 | 1950-05-02 | 0 | Details |
| US2502960A | Record controlled punching machine | Expired / Lapsed | 1946-09-06 | 1950-04-04 | 0 | Details |
| US2501821A | Multidigit number comparing device | Expired / Lapsed | 1947-07-17 | 1950-03-28 | 0 | Details |
| US2501495A | Copying process | Expired / Lapsed | 1946-05-04 | 1950-03-21 | 0 | Details |
| US2500294A | Descending counter | Expired / Lapsed | 1947-08-13 | 1950-03-14 | 0 | Details |
| US2496579A | Sensing system for magnetically recorded signals | Expired / Lapsed | 1949-01-05 | 1950-02-07 | 0 | Details |
| US2496585A | Contiguous rotation counter | Expired / Lapsed | 1948-06-26 | 1950-02-07 | 0 | Details |
| US2493897A | Speed responsive switch | Expired / Lapsed | 1947-06-07 | 1950-01-10 | 0 | Details |
| US2493848A | Record card | Expired / Lapsed | 1947-03-28 | 1950-01-10 | 0 | Details |
| US2493862A | Dividing machine | Expired / Lapsed | 1946-10-03 | 1950-01-10 | 0 | Details |
| US2493858A | Alphabet printing tabulator with program controls | Expired / Lapsed | 1942-11-28 | 1950-01-10 | 0 | Details |
| US2490373A | Key controlled machines with record punching and printing m… | Expired / Lapsed | 1947-07-22 | 1949-12-06 | 0 | Details |
| US2490362A | Record controlled calculating machine | Expired / Lapsed | 1945-12-21 | 1949-12-06 | 0 | Details |
| US2484114A | Record perforation analyzing means | Expired / Lapsed | 1946-07-16 | 1949-10-11 | 0 | Details |
| US2484642A | Record card | Expired / Lapsed | 1945-12-17 | 1949-10-11 | 0 | Details |
| US2484084A | Gaseous tube and circuit | Expired / Lapsed | 1945-11-27 | 1949-10-11 | 0 | Details |
| US2484115A | Carry device | Expired / Lapsed | 1945-11-27 | 1949-10-11 | 0 | Details |
| US2484081A | Electrical item comparing system | Expired / Lapsed | 1943-04-17 | 1949-10-11 | 0 | Details |
| US2478275A | Record card sensing device | Expired / Lapsed | 1948-01-13 | 1949-08-09 | 0 | Details |
| US2469655A | Counter actuating and resetting mechanism | Expired / Lapsed | 1945-02-21 | 1949-05-10 | 0 | Details |
| US2464608A | Record controlled printing apparatus | Expired / Lapsed | 1946-01-24 | 1949-03-15 | 0 | Details |
| US2464561A | Record feeding machine | Expired / Lapsed | 1943-06-24 | 1949-03-15 | 0 | Details |
| US2461412A | Accounting apparatus | Expired / Lapsed | 1945-03-17 | 1949-02-08 | 0 | Details |
| US2456825A | Distributor | Expired / Lapsed | 1945-10-18 | 1948-12-21 | 0 | Details |
| US2456818A | Electronic trigger circuit with pulse output attenuating me… | Expired / Lapsed | 1945-03-17 | 1948-12-21 | 0 | Details |
| US2453231A | Electrical switch | Expired / Lapsed | 1945-08-09 | 1948-11-09 | 0 | Details |
| US2451722A | Power-operated skip tabulating mechanism for typewriting ma… | Expired / Lapsed | 1945-02-24 | 1948-10-19 | 0 | Details |
| US2448761A | Circuit bearing element | Expired / Lapsed | 1947-10-23 | 1948-09-07 | 0 | Details |
| US2448830A | Record sensing and comparing means | Expired / Lapsed | 1947-04-15 | 1948-09-07 | 0 | Details |
| US2448842A | Record-controlled printing apparatus | Expired / Lapsed | 1945-06-09 | 1948-09-07 | 0 | Details |
| US2447800A | Sequential electronic commutator with supplementary grid co… | Expired / Lapsed | 1945-04-10 | 1948-08-24 | 0 | Details |
| US2447799A | Sequential electronic commutator with supplementary grid co… | Expired / Lapsed | 1945-04-05 | 1948-08-24 | 0 | Details |
| US2442984A | Interconnection device | Expired / Lapsed | 1945-03-31 | 1948-06-08 | 0 | Details |
| US2439470A | Variable spacing mechanism for typewriting machines | Expired / Lapsed | 1944-11-14 | 1948-04-13 | 0 | Details |
| US2438071A | Perforated card controlled alphabet and numeral printer | Expired / Lapsed | 1944-12-23 | 1948-03-16 | 0 | Details |
| US2438081A | Record controlled accounting machine | Expired / Lapsed | 1943-07-15 | 1948-03-16 | 0 | Details |
| US2436829A | Bipolar magnetic control record | Expired / Lapsed | 1945-01-31 | 1948-03-02 | 0 | Details |
| US2436126A | Apparatus for recording or transmitting intelligence | Expired / Lapsed | 1943-06-30 | 1948-02-17 | 0 | Details |
| US2434500A | Accounting machine | Expired / Lapsed | 1945-06-14 | 1948-01-13 | 0 | Details |
| US2434499A | Relay computing mechanism | Expired / Lapsed | 1944-11-10 | 1948-01-13 | 0 | Details |
| US2434487A | Record controlled adding and comparing machine | Expired / Lapsed | 1941-09-13 | 1948-01-13 | 0 | Details |
| US2432787A | Tape punch | Expired / Lapsed | 1944-10-31 | 1947-12-16 | 0 | Details |
| US2431017A | Record card | Expired / Lapsed | 1944-03-04 | 1947-11-18 | 0 | Details |
| US2431058A | Control mechanism for dispensing apparatus | Expired / Lapsed | 1942-08-22 | 1947-11-18 | 0 | Details |
| US2428605A | Stenographic machine | Expired / Lapsed | 1944-10-21 | 1947-10-07 | 0 | Details |
| US2428617A | Gas-filled tube type of relaxation oscillator system | Expired / Lapsed | 1943-06-19 | 1947-10-07 | 0 | Details |
| US2426049A | Record controlled multiple line printing mechanism | Expired / Lapsed | 1943-09-16 | 1947-08-19 | 0 | Details |
| US2425549A | Calculation checking device | Expired / Lapsed | 1944-08-31 | 1947-08-12 | 0 | Details |
| US2424088A | Educational device for aerial gunners | Expired / Lapsed | 1945-02-02 | 1947-07-15 | 0 | Details |
| US2424118A | Apparatus for continuously recording the path of flight of … | Expired / Lapsed | 1943-04-29 | 1947-07-15 | 0 | Details |
| US2421656A | Photographic justifying apparatus | Expired / Lapsed | 1944-10-27 | 1947-06-03 | 0 | Details |
| US2421606A | Apparatus for producing sharply defined signaling impulses | Expired / Lapsed | 1942-11-14 | 1947-06-03 | 0 | Details |
| US2417369A | Multiple circuit connector of the plug type | Expired / Lapsed | 1944-03-29 | 1947-03-11 | 0 | Details |
| US2412422A | Recording apparatus | Expired / Lapsed | 1944-10-11 | 1946-12-10 | 0 | Details |
| US2407176A | Plugboard | Expired / Lapsed | 1944-12-12 | 1946-09-03 | 0 | Details |
| US2407196A | Accounting machine | Expired / Lapsed | 1943-07-15 | 1946-09-03 | 0 | Details |
| US2405291A | Printing screen | Expired / Lapsed | 1944-11-10 | 1946-08-06 | 0 | Details |
| US2405287A | Record controlled accounting machine | Expired / Lapsed | 1943-01-01 | 1946-08-06 | 0 | Details |
| US2403550A | Sorting machine | Expired / Lapsed | 1942-12-24 | 1946-07-09 | 0 | Details |
| US2402989A | Accumulating apparatus | Expired / Lapsed | 1941-05-23 | 1946-07-02 | 0 | Details |
| US2402988A | Accounting apparatus | Expired / Lapsed | 1941-05-23 | 1946-07-02 | 0 | Details |
| US2403005A | Typewriting calculating machine | Expired / Lapsed | 1939-11-24 | 1946-07-02 | 0 | Details |
| US2401430A | Plugboard contactors | Expired / Lapsed | 1944-12-15 | 1946-06-04 | 0 | Details |
| US2399724A | Alphabet printing mechanism | Expired / Lapsed | 1943-06-24 | 1946-05-07 | 0 | Details |
| US2398036A | Printing mechanism | Expired / Lapsed | 1943-04-21 | 1946-04-09 | 0 | Details |
| US2396391A | Alterproofing record material | Expired / Lapsed | 1944-12-29 | 1946-03-12 | 0 | Details |
| US2394604A | Perforating apparatus | Expired / Lapsed | 1944-06-22 | 1946-02-12 | 0 | Details |
| US2394925A | Electrical calculating machine | Expired / Lapsed | 1943-08-28 | 1946-02-12 | 0 | Details |
| US2394924A | Electric calculating machine | Expired / Lapsed | 1943-03-30 | 1946-02-12 | 0 | Details |
| US2394637A | Accounting machine | Expired / Lapsed | 1941-05-24 | 1946-02-12 | 0 | Details |
| US2392224A | Optical recorder | Expired / Lapsed | 1942-09-16 | 1946-01-01 | 0 | Details |
| US2390415A | Record controlled annunciator | Expired / Lapsed | 1944-04-11 | 1945-12-04 | 0 | Details |
| US2390414A | Stenographic machine | Expired / Lapsed | 1943-07-29 | 1945-12-04 | 0 | Details |
| US2390439A | Optical record interpreter | Expired / Lapsed | 1943-02-02 | 1945-12-04 | 0 | Details |
| US2390413A | Printing machine | Expired / Lapsed | 1942-12-31 | 1945-12-04 | 0 | Details |
| US2388351A | Signal controlled printing apparatus | Expired / Lapsed | 1944-12-22 | 1945-11-06 | 0 | Details |
| US2381862A | Printing mechanism | Expired / Lapsed | 1944-03-10 | 1945-08-14 | 0 | Details |
| US2379828A | Record controlled machine | Expired / Lapsed | 1940-07-24 | 1945-07-03 | 0 | Details |
| US2377801A | Punching apparatus | Expired / Lapsed | 1943-12-23 | 1945-06-05 | 0 | Details |
| US2377783A | Record sensing means | Expired / Lapsed | 1943-01-12 | 1945-06-05 | 0 | Details |
| US2377762A | Accounting machine | Expired / Lapsed | 1941-07-08 | 1945-06-05 | 0 | Details |
| US2377754A | Recording apparatus | Expired / Lapsed | 1940-11-16 | 1945-06-05 | 0 | Details |
| US2377764A | Accounting means | Expired / Lapsed | 1940-10-24 | 1945-06-05 | 0 | Details |
| US2375275A | Record controlled accounting machine | Expired / Lapsed | 1942-03-03 | 1945-05-08 | 0 | Details |
| US2375332A | Record controlled accounting machine | Expired / Lapsed | 1940-05-23 | 1945-05-08 | 0 | Details |
| US2372887A | Record controlled tape perforator with manually controlled … | Expired / Lapsed | 1944-05-03 | 1945-04-03 | 0 | Details |
| US2372882A | Card sensing machine | Expired / Lapsed | 1941-12-23 | 1945-04-03 | 0 | Details |
| US2370616A | Combined dividing and multiplying machine | Expired / Lapsed | 1944-07-12 | 1945-03-06 | 0 | Details |
| US2370989A | Code translating recorder | Expired / Lapsed | 1943-12-28 | 1945-03-06 | 0 | Details |
| US2369474A | Code translator | Expired / Lapsed | 1943-12-10 | 1945-02-13 | 0 | Details |
| US2369430A | Key controlled calculating mechanism | Expired / Lapsed | 1942-04-23 | 1945-02-13 | 0 | Details |
| US2369431A | Photographic identifying mark recorder | Expired / Lapsed | 1940-05-24 | 1945-02-13 | 0 | Details |
| US2366827A | Record sensing device | Expired / Lapsed | 1939-12-15 | 1945-01-09 | 0 | Details |
| US2364540A | Calculating machine | Expired / Lapsed | 1942-10-10 | 1944-12-05 | 0 | Details |
| US2364188A | Photographic recording apparatus | Expired / Lapsed | 1942-04-01 | 1944-12-05 | 0 | Details |
| US2364207A | Automatic punching machine | Expired / Lapsed | 1941-01-30 | 1944-12-05 | 0 | Details |
| US2362027A | Communication apparatus | Expired / Lapsed | 1943-11-13 | 1944-11-07 | 0 | Details |
| US2362004A | Analyzing device | Expired / Lapsed | 1940-05-28 | 1944-11-07 | 0 | Details |
| US2359617A | Magnetic recording apparatus | Expired / Lapsed | 1941-11-29 | 1944-10-03 | 0 | Details |
| US2359616A | Accounting machine | Expired / Lapsed | 1941-06-18 | 1944-10-03 | 0 | Details |
| US2359631A | Dividing machine | Expired / Lapsed | 1941-04-15 | 1944-10-03 | 0 | Details |
| US2359670A | Record controlled machine | Expired / Lapsed | 1936-12-24 | 1944-10-03 | 0 | Details |
| US2357455A | Accounting machine | Expired / Lapsed | 1940-10-30 | 1944-09-05 | 0 | Details |
| US2355389A | Recording machine | Expired / Lapsed | 1942-12-24 | 1944-08-08 | 0 | Details |
| US2355297A | Perforating apparatus | Expired / Lapsed | 1942-11-10 | 1944-08-08 | 0 | Details |
| US2353083A | Recording machine | Expired / Lapsed | 1942-08-27 | 1944-07-04 | 0 | Details |
| US2353003A | Record sensing device | Expired / Lapsed | 1940-11-15 | 1944-07-04 | 0 | Details |
| US2353002A | Dispensing and tabulating machine | Expired / Lapsed | 1938-06-09 | 1944-07-04 | 0 | Details |
| US2350405A | Automatic meter reading apparatus | Expired / Lapsed | 1942-04-18 | 1944-06-06 | 0 | Details |
| US2348059A | Paper feeding mechanism | Expired / Lapsed | 1943-02-19 | 1944-05-02 | 0 | Details |
| US2348141A | Computing mechanism | Expired / Lapsed | 1939-05-31 | 1944-05-02 | 0 | Details |
| US2346268A | Record controlled perforating apparatus | Expired / Lapsed | 1942-07-09 | 1944-04-11 | 0 | Details |
| US2346267A | Perforating apparatus | Expired / Lapsed | 1942-07-02 | 1944-04-11 | 0 | Details |
| US2346250A | Accounting machine | Expired / Lapsed | 1939-12-06 | 1944-04-11 | 0 | Details |
| US2344254A | Telemetering apparatus | Expired / Lapsed | 1943-01-27 | 1944-03-14 | 0 | Details |
| US2343405A | Communication apparatus | Expired / Lapsed | 1943-06-17 | 1944-03-07 | 0 | Details |
| US2343414A | Punching machine | Expired / Lapsed | 1943-02-24 | 1944-03-07 | 0 | Details |
| US2340772A | Accumulating means | Expired / Lapsed | 1940-07-25 | 1944-02-01 | 0 | Details |
| US2338173A | Printing mechanism | Expired / Lapsed | 1941-10-25 | 1944-01-04 | 0 | Details |
| US2338206A | Multiplying machine | Expired / Lapsed | 1941-06-12 | 1944-01-04 | 0 | Details |
| US2335949A | Punching machine | Expired / Lapsed | 1941-08-06 | 1943-12-07 | 0 | Details |
| US2335928A | Record feeding and sensing device | Expired / Lapsed | 1940-06-19 | 1943-12-07 | 0 | Details |
| US2335755A | Automatic telemetering system | Expired / Lapsed | 1942-07-23 | 1943-11-30 | 0 | Details |
| US2333463A | Apparatus for recording statistical records | Expired / Lapsed | 1941-03-19 | 1943-11-02 | 0 | Details |
| US2330948A | Plugboard | Expired / Lapsed | 1942-04-10 | 1943-10-05 | 0 | Details |
| US2328623A | Dividing machine | Expired / Lapsed | 1942-06-04 | 1943-09-07 | 0 | Details |
| US2328611A | Dividing machine | Expired / Lapsed | 1942-04-18 | 1943-09-07 | 0 | Details |
| US2328636A | Telegraph printer | Expired / Lapsed | 1941-07-01 | 1943-09-07 | 0 | Details |
| US2328638A | Printing mechanism | Expired / Lapsed | 1941-01-30 | 1943-09-07 | 0 | Details |
| US2328610A | Multiplying and dividing machine | Expired / Lapsed | 1938-06-10 | 1943-09-07 | 0 | Details |
| US2325961A | Tape perforating apparatus | Expired / Lapsed | 1942-07-23 | 1943-08-03 | 0 | Details |
| US2325958A | Printing mechanism | Expired / Lapsed | 1940-12-27 | 1943-08-03 | 0 | Details |
| US2325409A | Meter reading apparatus | Expired / Lapsed | 1942-05-12 | 1943-07-27 | 0 | Details |
| US2323372A | Film data selecting and viewing machine | Expired / Lapsed | 1940-06-27 | 1943-07-06 | 0 | Details |
| US2321922A | Automatic meter reading apparatus | Expired / Lapsed | 1942-04-18 | 1943-06-15 | 0 | Details |
| US2320338A | Verifying machine | Expired / Lapsed | 1941-11-18 | 1943-06-01 | 0 | Details |
| US2320810A | Typewriting machine | Expired / Lapsed | 1941-09-18 | 1943-06-01 | 0 | Details |
| US2320836A | Sensing mechanism | Expired / Lapsed | 1940-11-13 | 1943-06-01 | 0 | Details |
| US2320337A | Cathode tube recorder for calculating machines | Expired / Lapsed | 1939-06-30 | 1943-06-01 | 0 | Details |
| US2319412A | Automatic meter-reading apparatus | Expired / Lapsed | 1940-10-18 | 1943-05-18 | 0 | Details |
| US2318299A | Intercontrolled typewriter-punching machine | Expired / Lapsed | 1941-12-23 | 1943-05-04 | 0 | Details |
| US2315741A | Verifying machine | Expired / Lapsed | 1939-09-28 | 1943-04-06 | 0 | Details |
| US2314720A | Automatic meter-reading apparatus | Expired / Lapsed | 1940-10-18 | 1943-03-23 | 0 | Details |
| US2314719A | Automatic meter-reading apparatus | Expired / Lapsed | 1940-08-02 | 1943-03-23 | 0 | Details |
| US2314718A | Accounting apparatus | Expired / Lapsed | 1940-04-26 | 1943-03-23 | 0 | Details |
| US2310300A | Register mechanism for indicating instruments | Expired / Lapsed | 1940-08-02 | 1943-02-09 | 0 | Details |
| US2310445A | Perforated record card | Expired / Lapsed | 1938-12-16 | 1943-02-09 | 0 | Details |
| US2310418A | Paper feeding device | Expired / Lapsed | 1936-09-24 | 1943-02-09 | 0 | Details |
| US2307100A | Record controlled machine | Expired / Lapsed | 1939-10-26 | 1943-01-05 | 0 | Details |
| US2304495A | Multiplying machine | Expired / Lapsed | 1941-05-17 | 1942-12-08 | 0 | Details |
| US2304769A | Communication system | Expired / Lapsed | 1940-08-17 | 1942-12-08 | 0 | Details |
| US2304698A | Meter reading apparatus | Expired / Lapsed | 1940-08-02 | 1942-12-08 | 0 | Details |
| US2302002A | Record controlled perforating machine | Expired / Lapsed | 1941-11-29 | 1942-11-17 | 0 | Details |
| US2302033A | Signaling system | Expired / Lapsed | 1941-07-08 | 1942-11-17 | 0 | Details |
| US2302081A | Signaling system | Expired / Lapsed | 1941-06-19 | 1942-11-17 | 0 | Details |
| US2302001A | Tens carry mechanism for totalizers | Expired / Lapsed | 1941-02-11 | 1942-11-17 | 0 | Details |
| US2302025A | Accounting machine | Expired / Lapsed | 1940-03-22 | 1942-11-17 | 0 | Details |
| US2302009A | Transmission system for statistical data | Expired / Lapsed | 1939-03-25 | 1942-11-17 | 0 | Details |
| US2297772A | Signaling system | Expired / Lapsed | 1941-06-19 | 1942-10-06 | 0 | Details |
| US2297793A | Communication system | Expired / Lapsed | 1940-01-27 | 1942-10-06 | 0 | Details |
| US2297789A | Transcribing apparatus | Expired / Lapsed | 1939-11-04 | 1942-10-06 | 0 | Details |
| US2297816A | Electrical control system | Expired / Lapsed | 1938-12-14 | 1942-10-06 | 0 | Details |
| US2295534A | Automatic meter-reading apparatus | Expired / Lapsed | 1940-08-02 | 1942-09-15 | 0 | Details |
| US2295533A | Meter reading apparatus | Expired / Lapsed | 1940-08-02 | 1942-09-15 | 0 | Details |
| US2294734A | Statistical machine | Expired / Lapsed | 1941-03-06 | 1942-09-01 | 0 | Details |
| US2294720A | Apparatus for verifying statistical data | Expired / Lapsed | 1939-07-25 | 1942-09-01 | 0 | Details |
| US2294751A | Record card controlled machine | Expired / Lapsed | 1939-06-08 | 1942-09-01 | 0 | Details |
| US2294681A | Record card controlled machine | Expired / Lapsed | 1939-06-06 | 1942-09-01 | 0 | Details |
| US2288862A | Method of and means for preparing magnetizable bodies to re… | Expired / Lapsed | 1940-10-24 | 1942-07-07 | 0 | Details |
| US2288770A | Statistical record | Expired / Lapsed | 1936-12-30 | 1942-07-07 | 0 | Details |
| US2285819A | Automatic meter-reading apparatus | Expired / Lapsed | 1940-10-18 | 1942-06-09 | 0 | Details |
| US2285289A | Card punching machine | Expired / Lapsed | 1941-03-26 | 1942-06-02 | 0 | Details |
| US2285353A | Calculating machine | Expired / Lapsed | 1938-06-17 | 1942-06-02 | 0 | Details |
| US2283070A | Automatic meter-reading apparatus | Expired / Lapsed | 1940-10-18 | 1942-05-12 | 0 | Details |
| US2283071A | Autoamtic meter-reading apparatus | Expired / Lapsed | 1940-10-18 | 1942-05-12 | 0 | Details |
| US2283072A | Autoamtic meter-reading apparatus | Expired / Lapsed | 1940-10-18 | 1942-05-12 | 0 | Details |
| US2282108A | Time delay circuit | Expired / Lapsed | 1940-11-20 | 1942-05-05 | 0 | Details |
| US2282066A | Relay | Expired / Lapsed | 1939-09-08 | 1942-05-05 | 0 | Details |
| US2282029A | Recording device | Expired / Lapsed | 1939-06-30 | 1942-05-05 | 0 | Details |
| US2282028A | Electrical accumulator | Expired / Lapsed | 1938-06-21 | 1942-05-05 | 0 | Details |
| US2281350A | Number displaying device | Expired / Lapsed | 1940-04-10 | 1942-04-28 | 0 | Details |
| US2279009A | Communication system | Expired / Lapsed | 1940-08-17 | 1942-04-07 | 0 | Details |
| US2278993A | Record controlled indicating mechanism | Expired / Lapsed | 1940-01-23 | 1942-04-07 | 0 | Details |
| US2275609A | Apparatus for verifying statistical data | Expired / Lapsed | 1939-07-25 | 1942-03-10 | 0 | Details |
| US2275590A | Educational device | Expired / Lapsed | 1938-06-21 | 1942-03-10 | 0 | Details |
| US2275396A | Record controlled perforating machine | Expired / Lapsed | 1941-03-19 | 1942-03-03 | 0 | Details |
| US2272411A | Educational device | Expired / Lapsed | 1940-11-07 | 1942-02-10 | 0 | Details |
| US2267812A | Clock time and call indicating system | Expired / Lapsed | 1940-01-11 | 1941-12-30 | 0 | Details |
| US2268499A | Control element for statistical machines | Expired / Lapsed | 1939-06-30 | 1941-12-30 | 0 | Details |
| US2265419A | Conductive ink | Expired / Lapsed | 1941-03-12 | 1941-12-09 | 0 | Details |
| US2265462A | Record analyzing mechanism | Expired / Lapsed | 1939-09-15 | 1941-12-09 | 0 | Details |
| US2265445A | Record controlled machine | Expired / Lapsed | 1939-02-03 | 1941-12-09 | 0 | Details |
| US2264623A | Character displaying control apparatus | Expired / Lapsed | 1940-01-09 | 1941-12-02 | 0 | Details |
| US2264587A | Character displaying control apparatus | Expired / Lapsed | 1940-01-09 | 1941-12-02 | 0 | Details |
| US2264615A | Keyboard controlled photographic recorder | Expired / Lapsed | 1939-11-01 | 1941-12-02 | 0 | Details |
| US2261542A | Reading machine | Expired / Lapsed | 1937-12-21 | 1941-11-04 | 0 | Details |
| US2258110A | Accounting machine | Expired / Lapsed | 1938-08-31 | 1941-10-07 | 0 | Details |
| US2258106A | Apparatus for preparing statistical records | Expired / Lapsed | 1938-06-17 | 1941-10-07 | 0 | Details |
| US2255030A | Keyboard locking device | Expired / Lapsed | 1939-10-05 | 1941-09-02 | 0 | Details |
| US2255011A | Recording machine | Expired / Lapsed | 1938-08-31 | 1941-09-02 | 0 | Details |
| US2254933A | Record controlled machine | Expired / Lapsed | 1938-06-17 | 1941-09-02 | 0 | Details |
| US2254932A | Statistical machine | Expired / Lapsed | 1938-05-11 | 1941-09-02 | 0 | Details |
| US2254931A | Control record for accounting machines | Expired / Lapsed | 1937-05-27 | 1941-09-02 | 0 | Details |
| US2250847A | Electrical accumulator | Expired / Lapsed | 1938-05-14 | 1941-07-29 | 0 | Details |
| US2247908A | Apparatus for recording statistical data | Expired / Lapsed | 1939-07-25 | 1941-07-01 | 0 | Details |
| US2247905A | Apparatus for preparing statistical records | Expired / Lapsed | 1939-07-25 | 1941-07-01 | 0 | Details |
| US2247916A | Machine for interpreting and printing perforated records | Expired / Lapsed | 1938-10-18 | 1941-07-01 | 0 | Details |
| US2244252A | Paper spacing mechanism for printing machines | Expired / Lapsed | 1938-04-15 | 1941-06-03 | 0 | Details |
| US2244241A | Cross-adding accounting machine and programing means theref… | Expired / Lapsed | 1937-10-01 | 1941-06-03 | 0 | Details |
| US2244231A | Statistical record | Expired / Lapsed | 1936-12-17 | 1941-06-03 | 0 | Details |
| US2243474A | Number comparing means | Expired / Lapsed | 1937-12-07 | 1941-05-27 | 0 | Details |
| US2243473A | Dividing machine | Expired / Lapsed | 1936-07-08 | 1941-05-27 | 0 | Details |
| US2240562A | Card controlled typewriter | Expired / Lapsed | 1937-02-17 | 1941-05-06 | 0 | Details |
| US2240545A | Reading machine | Expired / Lapsed | 1936-10-28 | 1941-05-06 | 0 | Details |
| US2240544A | Reading machine | Expired / Lapsed | 1936-10-27 | 1941-05-06 | 0 | Details |
| US2237153A | Tabulating machine | Expired / Lapsed | 1938-07-19 | 1941-04-01 | 0 | Details |
| US2234241A | Tabulating machine | Expired / Lapsed | 1936-11-05 | 1941-03-11 | 0 | Details |
| US2234262A | Sheet feeding means | Expired / Lapsed | 1936-06-11 | 1941-03-11 | 0 | Details |
| US2232006A | Accounting machine | Expired / Lapsed | 1937-12-30 | 1941-02-18 | 0 | Details |
| US2231494A | Sorting machine for statistical records | Expired / Lapsed | 1939-07-25 | 1941-02-11 | 0 | Details |
| US2230679A | Signaling system | Expired / Lapsed | 1938-11-10 | 1941-02-04 | 0 | Details |
| US2230673A | Multiplying and checking machine | Expired / Lapsed | 1936-09-25 | 1941-02-04 | 0 | Details |
| US2230129A | Accounting machine | Expired / Lapsed | 1936-05-06 | 1941-01-28 | 0 | Details |
| US2228330A | Calculating machine | Expired / Lapsed | 1937-06-09 | 1941-01-14 | 0 | Details |
| US2224764A | Data reproducing machine | Expired / Lapsed | 1939-06-16 | 1940-12-10 | 0 | Details |
| US2224762A | Data reproducing machine | Expired / Lapsed | 1939-06-16 | 1940-12-10 | 0 | Details |
| US2224774A | Tabulating machine | Expired / Lapsed | 1936-06-24 | 1940-12-10 | 0 | Details |
| US2224769A | Tabulating machine | Expired / Lapsed | 1935-12-12 | 1940-12-10 | 0 | Details |
| US2220474A | Photographic statistical machine | Expired / Lapsed | 1938-05-14 | 1940-11-05 | 0 | Details |
| US2220489A | Sensing device | Expired / Lapsed | 1936-12-01 | 1940-11-05 | 0 | Details |
| US2219737A | Calculating machine | Expired / Lapsed | 1937-06-09 | 1940-10-29 | 0 | Details |
| US2217161A | Signaling system | Expired / Lapsed | 1939-01-14 | 1940-10-08 | 0 | Details |
| US2217150A | Recording machine | Expired / Lapsed | 1938-05-14 | 1940-10-08 | 0 | Details |
| US2217208A | Weighing and recording mechanism | Expired / Lapsed | 1938-01-28 | 1940-10-08 | 0 | Details |
| US2217196A | Convertible accounting machine | Expired / Lapsed | 1935-08-07 | 1940-10-08 | 0 | Details |
| US2213565A | Multiplying machine | Expired / Lapsed | 1937-09-10 | 1940-09-03 | 0 | Details |
| US2211847A | Photographic recording machine | Expired / Lapsed | 1932-12-12 | 1940-08-20 | 0 | Details |
| US2210576A | Signaling system | Expired / Lapsed | 1938-09-16 | 1940-08-06 | 0 | Details |
| US2210575A | Signaling system | Expired / Lapsed | 1938-09-16 | 1940-08-06 | 0 | Details |
| US2210574A | Signaling system | Expired / Lapsed | 1938-09-16 | 1940-08-06 | 0 | Details |
| US2210577A | Signaling system | Expired / Lapsed | 1938-09-16 | 1940-08-06 | 0 | Details |
| US2209395A | Signaling system | Expired / Lapsed | 1937-12-21 | 1940-07-30 | 0 | Details |
| US2206662A | Fabricating article of beryllium copper | Expired / Lapsed | 1938-02-01 | 1940-07-02 | 0 | Details |
| US2206660A | Counting device | Expired / Lapsed | 1937-04-15 | 1940-07-02 | 0 | Details |
| US2206665A | Communication system | Expired / Lapsed | 1936-11-28 | 1940-07-02 | 0 | Details |
| US2203000A | Machine for reading perforated record cards | Expired / Lapsed | 1938-12-13 | 1940-06-04 | 0 | Details |
| US2199561A | Printing mechanism | Expired / Lapsed | 1938-03-05 | 1940-05-07 | 0 | Details |
| US2199560A | Electric plug | Expired / Lapsed | 1937-11-13 | 1940-05-07 | 0 | Details |
| US2199541A | Data transcribing machine | Expired / Lapsed | 1937-03-30 | 1940-05-07 | 0 | Details |
| US2199537A | Multiplying machine | Expired / Lapsed | 1936-05-06 | 1940-05-07 | 0 | Details |
| US2199547A | Record perforating device | Expired / Lapsed | 1932-07-02 | 1940-05-07 | 0 | Details |
| US2196166A | Data reproducing machine | Expired / Lapsed | 1939-06-30 | 1940-04-02 | 0 | Details |
| US2195855A | Signaling system | Expired / Lapsed | 1937-12-21 | 1940-04-02 | 0 | Details |
| US2195852A | Printing telegraph system | Expired / Lapsed | 1937-10-26 | 1940-04-02 | 0 | Details |
| US2195845A | Card selecting machine | Expired / Lapsed | 1937-07-03 | 1940-04-02 | 0 | Details |
| US2195853A | Signal generator | Expired / Lapsed | 1936-12-01 | 1940-04-02 | 0 | Details |
| US2192612A | Multiplying machine | Expired / Lapsed | 1937-09-24 | 1940-03-05 | 0 | Details |
| US2192599A | Multiplying machine | Expired / Lapsed | 1936-05-27 | 1940-03-05 | 0 | Details |
| US2192003A | Accounting machine | Expired / Lapsed | 1934-10-12 | 1940-02-27 | 0 | Details |
| US2189046A | Printing mechanism | Expired / Lapsed | 1937-09-15 | 1940-02-06 | 0 | Details |
| US2185697A | Multiplying machine | Expired / Lapsed | 1937-06-17 | 1940-01-02 | 0 | Details |
| US2182000A | Synchronizing system | Expired / Lapsed | 1938-09-24 | 1939-12-05 | 0 | Details |
| US2181992A | Paper feeding device | Expired / Lapsed | 1938-05-11 | 1939-12-05 | 0 | Details |
| US2181999A | Printing mechanism | Expired / Lapsed | 1936-06-12 | 1939-12-05 | 0 | Details |
| US2178749A | Printing mechanism | Expired / Lapsed | 1936-12-01 | 1939-11-07 | 0 | Details |
| US2178950A | Multiplying machine | Expired / Lapsed | 1928-01-05 | 1939-11-07 | 0 | Details |
| US2178064A | Sliding scale multiplying machine | Expired / Lapsed | 1932-07-12 | 1939-10-31 | 0 | Details |
| US2174683A | Accounting apparatus | Expired / Lapsed | 1930-12-31 | 1939-10-03 | 0 | Details |
| US2172330A | Selective film printer | Expired / Lapsed | 1937-01-21 | 1939-09-05 | 0 | Details |
| US2172328A | Comparing and sorting device | Expired / Lapsed | 1933-12-13 | 1939-09-05 | 0 | Details |
| US2172078A | Accounting machine | Expired / Lapsed | 1933-12-02 | 1939-09-05 | 0 | Details |
| US2170543A | Key punch multiplying machine | Expired / Lapsed | 1932-10-04 | 1939-08-22 | 0 | Details |
| US2168763A | Record controlled machine with improved serial number contr… | Expired / Lapsed | 1937-12-31 | 1939-08-08 | 0 | Details |
| US2168443A | Indicating device | Expired / Lapsed | 1936-01-03 | 1939-08-08 | 0 | Details |
| US2168460A | Signaling system | Expired / Lapsed | 1935-08-17 | 1939-08-08 | 0 | Details |
| US2166928A | Multiplying machine | Expired / Lapsed | 1934-05-10 | 1939-07-25 | 0 | Details |
| US2165301A | Typewriting machine | Expired / Lapsed | 1937-07-24 | 1939-07-11 | 0 | Details |
| US2165237A | Communication system | Expired / Lapsed | 1936-12-23 | 1939-07-11 | 0 | Details |
| US2165250A | Statistical card | Expired / Lapsed | 1936-12-01 | 1939-07-11 | 0 | Details |
| US2165288A | Tabulating machine | Expired / Lapsed | 1935-11-14 | 1939-07-11 | 0 | Details |
| US2165230A | Multiplying machine | Expired / Lapsed | 1935-06-04 | 1939-07-11 | 0 | Details |
| US2161598A | Card sensing device | Expired / Lapsed | 1936-12-23 | 1939-06-06 | 0 | Details |
| US2157035A | Printing mechanism | Expired / Lapsed | 1936-09-05 | 1939-05-02 | 0 | Details |
| US2156969A | Tabulating machine | Expired / Lapsed | 1933-10-25 | 1939-05-02 | 0 | Details |
| US2153215A | Percentage counter | Expired / Lapsed | 1936-09-26 | 1939-04-04 | 0 | Details |
| US2153179A | Oscillator circuit | Expired / Lapsed | 1936-09-10 | 1939-04-04 | 0 | Details |
| US2153178A | Method of and means for signaling | Expired / Lapsed | 1934-12-07 | 1939-04-04 | 0 | Details |
| US2153202A | Electrical filter | Expired / Lapsed | 1934-08-17 | 1939-04-04 | 0 | Details |
| US2150227A | Tabulating machine | Expired / Lapsed | 1935-10-11 | 1939-03-14 | 0 | Details |
| US2150241A | Communication system | Expired / Lapsed | 1935-02-23 | 1939-03-14 | 0 | Details |
| US2150240A | Communication system | Expired / Lapsed | 1934-12-31 | 1939-03-14 | 0 | Details |
| US2150256A | Record controlled statistical machine | Expired / Lapsed | 1932-04-06 | 1939-03-14 | 0 | Details |
| US2146283A | Card punching machine | Expired / Lapsed | 1935-06-21 | 1939-02-07 | 0 | Details |
| US2141598A | Automatic decimal point selecting device for accounting mac… | Expired / Lapsed | 1934-05-04 | 1938-12-27 | 0 | Details |
| US2141597A | Decimal point control for accounting machines | Expired / Lapsed | 1934-04-28 | 1938-12-27 | 0 | Details |
| US2138646A | Paper feeding device | Expired / Lapsed | 1938-05-24 | 1938-11-29 | 0 | Details |
| US2131919A | Record controlled printing machine | Expired / Lapsed | 1937-08-13 | 1938-10-04 | 0 | Details |
| US2131911A | Light sensitive device | Expired / Lapsed | 1935-08-20 | 1938-10-04 | 0 | Details |
| US2131908A | Multiplying machine | Expired / Lapsed | 1932-12-20 | 1938-10-04 | 0 | Details |
| US2131226A | Tabulating machine | Expired / Lapsed | 1934-06-07 | 1938-09-27 | 0 | Details |
| US2126640A | Record punch | Expired / Lapsed | 1937-04-24 | 1938-08-09 | 0 | Details |
| US2126666A | Multiplying machine | Expired / Lapsed | 1935-11-14 | 1938-08-09 | 0 | Details |
| US2124906A | Statistical machine | Expired / Lapsed | 1938-06-04 | 1938-07-26 | 0 | Details |
| US2120373A | Weight controlled machine | Expired / Lapsed | 1935-02-05 | 1938-06-14 | 0 | Details |
| US2120378A | Luminous sign | Expired / Lapsed | 1934-04-11 | 1938-06-14 | 0 | Details |
| US2120233A | Control means for record controlled accounting machines | Expired / Lapsed | 1933-03-23 | 1938-06-14 | 0 | Details |
| US2120228A | Accounting machine | Expired / Lapsed | 1933-02-01 | 1938-06-14 | 0 | Details |
| US2116732A | Coding and decoding machine | Expired / Lapsed | 1936-08-28 | 1938-05-10 | 0 | Details |
| US2116731A | Coding and decoding machine | Expired / Lapsed | 1936-08-27 | 1938-05-10 | 0 | Details |
| US2116653A | Tabulating and accounting machine | Expired / Lapsed | 1930-02-05 | 1938-05-10 | 0 | Details |
| US2115805A | Mail sorter | Expired / Lapsed | 1936-05-27 | 1938-05-03 | 0 | Details |
| US2111122A | Printing mechanism | Expired / Lapsed | 1936-12-22 | 1938-03-15 | 0 | Details |
| US2111116A | Record feeding device | Expired / Lapsed | 1936-09-22 | 1938-03-15 | 0 | Details |
| US2110854A | Department store machine | Expired / Lapsed | 1935-12-04 | 1938-03-15 | 0 | Details |
| US2111118A | Plugboard | Expired / Lapsed | 1935-03-09 | 1938-03-15 | 0 | Details |
| US2111154A | Printing telegraph system | Expired / Lapsed | 1934-10-27 | 1938-03-15 | 0 | Details |
| US2111153A | Communication system | Expired / Lapsed | 1934-07-21 | 1938-03-15 | 0 | Details |
| US2111117A | Perforated record controlled machine | Expired / Lapsed | 1934-03-20 | 1938-03-15 | 0 | Details |
| US2104544A | Image transmission system | Expired / Lapsed | 1935-03-19 | 1938-01-04 | 0 | Details |
| US2104546A | Conveyer scale | Expired / Lapsed | 1934-11-27 | 1938-01-04 | 0 | Details |
| US2101435A | Record controlled printing mechanism | Expired / Lapsed | 1934-12-28 | 1937-12-07 | 0 | Details |
| US2101452A | Recording scale | Expired / Lapsed | 1933-09-26 | 1937-12-07 | 0 | Details |
| US2098359A | Tabulating machine | Expired / Lapsed | 1930-12-05 | 1937-11-09 | 0 | Details |
| US2097145A | Record controlled and record making accounting machine | Expired / Lapsed | 1931-11-19 | 1937-10-26 | 0 | Details |
| US2093545A | Printing machine | Expired / Lapsed | 1933-10-25 | 1937-09-21 | 0 | Details |
| US2093566A | Perforated record controlled machine | Expired / Lapsed | 1933-02-20 | 1937-09-21 | 0 | Details |
| US2093529A | Tabulating machine | Expired / Lapsed | 1932-10-11 | 1937-09-21 | 0 | Details |
| US2090103A | Record controlled and record making accounting machine | Expired / Lapsed | 1932-11-19 | 1937-08-17 | 0 | Details |
| US2089309A | Sound recording and reproducing machine | Expired / Lapsed | 1933-12-30 | 1937-08-10 | 0 | Details |
| US2079440A | Communication system | Expired / Lapsed | 1935-02-09 | 1937-05-04 | 0 | Details |
| US2079429A | Device for interpreting punched cards | Expired / Lapsed | 1930-12-05 | 1937-05-04 | 0 | Details |
| US2074037A | Automatic self-synchronized transmitting system | Expired / Lapsed | 1933-08-30 | 1937-03-16 | 0 | Details |
| US2072447A | Tabulating machine | Expired / Lapsed | 1931-10-02 | 1937-03-02 | 0 | Details |
| US2066763A | Material controlling scale | Expired / Lapsed | 1934-06-09 | 1937-01-05 | 0 | Details |
| US2066750A | Card tabulating machine | Expired / Lapsed | 1931-03-28 | 1937-01-05 | 0 | Details |
| US2066029A | Recording and record feeding device | Expired / Lapsed | 1934-01-16 | 1936-12-29 | 0 | Details |
| US2063486A | Tabulating machine | Expired / Lapsed | 1933-03-30 | 1936-12-08 | 0 | Details |
| US2062119A | Successive discount accounting machine | Expired / Lapsed | 1932-10-15 | 1936-11-24 | 0 | Details |
| US2059797A | Tabulator | Expired / Lapsed | 1930-06-27 | 1936-11-03 | 0 | Details |
| US2056393A | Paper feeding device for printing machines | Expired / Lapsed | 1935-11-05 | 1936-10-06 | 0 | Details |
| US2056382A | Sorting machine | Expired / Lapsed | 1934-10-20 | 1936-10-06 | 0 | Details |
| US2056391A | Printing mechanism | Expired / Lapsed | 1934-08-14 | 1936-10-06 | 0 | Details |
| US2056403A | Accumulating device | Expired / Lapsed | 1932-01-06 | 1936-10-06 | 0 | Details |
| US2046082A | Manual and record controlled machine | Expired / Lapsed | 1935-02-27 | 1936-06-30 | 0 | Details |
| US2045977A | Punching device | Expired / Lapsed | 1934-07-21 | 1936-06-30 | 0 | Details |
| US2046005A | Automatic scale | Expired / Lapsed | 1932-11-18 | 1936-06-30 | 0 | Details |
| US2046027A | Tabulating machine | Expired / Lapsed | 1931-10-24 | 1936-06-30 | 0 | Details |
| US2045437A | Multiplying machine | Expired / Lapsed | 1932-11-21 | 1936-06-23 | 0 | Details |
| US2041880A | Card for statistical machines and method for manufacturing … | Expired / Lapsed | 1932-03-26 | 1936-05-26 | 0 | Details |
| US2036027A | Printing mechanism | Expired / Lapsed | 1934-05-02 | 1936-03-31 | 0 | Details |
| US2036016A | Printing mechanism | Expired / Lapsed | 1934-02-23 | 1936-03-31 | 0 | Details |
| US2036026A | Printing scale | Expired / Lapsed | 1933-10-28 | 1936-03-31 | 0 | Details |
| US2036014A | Printing scale | Expired / Lapsed | 1931-02-28 | 1936-03-31 | 0 | Details |
| US2030432A | Punching mechanism | Expired / Lapsed | 1934-03-24 | 1936-02-11 | 0 | Details |
| US2027077A | Scale | Expired / Lapsed | 1931-01-05 | 1936-01-07 | 0 | Details |
| US2019869A | Perforated record controlled machine | Expired / Lapsed | 1934-03-28 | 1935-11-05 | 0 | Details |
| US2019864A | Communication system | Expired / Lapsed | 1934-02-23 | 1935-11-05 | 0 | Details |
| US2019863A | Tabulating machine | Expired / Lapsed | 1932-07-29 | 1935-11-05 | 0 | Details |
| US2019301A | Recorder | Expired / Lapsed | 1929-10-12 | 1935-10-29 | 0 | Details |
| US2016709A | Record comparing and posting machine | Expired / Lapsed | 1932-08-25 | 1935-10-08 | 0 | Details |
| US2016704A | Accounting machine | Expired / Lapsed | 1931-12-23 | 1935-10-08 | 0 | Details |
| US2013543A | Perforating machine | Expired / Lapsed | 1934-07-05 | 1935-09-03 | 0 | Details |
| US2013533A | Printing mechanism | Expired / Lapsed | 1931-07-10 | 1935-09-03 | 0 | Details |
| US2010652A | Printing mechanism | Expired / Lapsed | 1933-09-06 | 1935-08-06 | 0 | Details |
| US2010653A | Record controlled statistical machine | Expired / Lapsed | 1933-07-12 | 1935-08-06 | 0 | Details |
| US2010642A | Accounting machine | Expired / Lapsed | 1930-01-07 | 1935-08-06 | 0 | Details |
| US2007391A | Record controlled punch | Expired / Lapsed | 1934-04-13 | 1935-07-09 | 0 | Details |
| US2007375A | Printing mechanism for accounting machines | Expired / Lapsed | 1933-09-09 | 1935-07-09 | 0 | Details |
| US2000764A | Communication system | Expired / Lapsed | 1934-02-10 | 1935-05-07 | 0 | Details |
| US2000404A | Sorting machine | Expired / Lapsed | 1932-01-16 | 1935-05-07 | 0 | Details |
| US2000233A | Accounting machine | Expired / Lapsed | 1931-12-18 | 1935-05-07 | 0 | Details |
| US2000403A | Method of and means for analyzing record cards | Expired / Lapsed | 1927-07-01 | 1935-05-07 | 0 | Details |
| US1997167A | Printing mechanism | Expired / Lapsed | 1933-10-07 | 1935-04-09 | 0 | Details |
| US1997157A | Card controlled machine | Expired / Lapsed | 1932-02-18 | 1935-04-09 | 0 | Details |
| US1994550A | Scale | Expired / Lapsed | 1932-01-15 | 1935-03-19 | 0 | Details |
| US1981987A | Word printing mechanism | Expired / Lapsed | 1933-05-25 | 1934-11-27 | 0 | Details |
| US1982216A | Sorting machine | Expired / Lapsed | 1933-04-12 | 1934-11-27 | 0 | Details |
| US1982020A | Tabulating machine | Expired / Lapsed | 1931-11-10 | 1934-11-27 | 0 | Details |
| US1978931A | Tabulating machine | Expired / Lapsed | 1930-10-30 | 1934-10-30 | 0 | Details |
| US1976617A | Tabulating machine | Expired / Lapsed | 1933-05-23 | 1934-10-09 | 0 | Details |
| US1976606A | Card punching device | Expired / Lapsed | 1932-07-21 | 1934-10-09 | 0 | Details |
| US1976585A | Money delivering device | Expired / Lapsed | 1930-10-16 | 1934-10-09 | 0 | Details |
| US1972977A | Tabulating machine | Expired / Lapsed | 1929-07-18 | 1934-09-11 | 0 | Details |
| US1965981A | Printing control mechanism | Expired / Lapsed | 1932-12-19 | 1934-07-10 | 0 | Details |
| US1965974A | Counter control | Expired / Lapsed | 1926-11-18 | 1934-07-10 | 0 | Details |
| US1962732A | Record controlled punching machine | Expired / Lapsed | 1933-04-20 | 1934-06-12 | 0 | Details |
| US1962731A | Sorting machine | Expired / Lapsed | 1933-01-19 | 1934-06-12 | 0 | Details |
| US1957167A | Coupon ticket printing machine | Expired / Lapsed | 1933-02-20 | 1934-05-01 | 0 | Details |
| US1954041A | Billing machine | Expired / Lapsed | 1931-12-05 | 1934-04-10 | 0 | Details |
| US1939083A | Article feeder for slicers | Expired / Lapsed | 1931-05-05 | 1933-12-12 | 0 | Details |
| US1933331A | Record-controlled machine | Expired / Lapsed | 1931-12-24 | 1933-10-31 | 0 | Details |
| US1933352A | Machine for calculatively interpreting preforated cards | Expired / Lapsed | 1928-03-01 | 1933-10-31 | 0 | Details |
| US1930252A | Typewriter accumulator | Expired / Lapsed | 1930-11-26 | 1933-10-10 | 0 | Details |
| US1926891A | Printing mechanism for accounting machines | Expired / Lapsed | 1928-09-05 | 1933-09-12 | 0 | Details |
| US1506382A | Record sheet and apparatus controlled thereby | Expired / Lapsed | 1922-06-07 | 1924-08-26 | 0 | Details |