Hitachi Ltd
Hitachi LtActive Patents
0
Total Holdings
522
Patent Holdings
Filter in Explorer →| Patent No. | Title | Status | Filing Date | Grant Date | Claims | Actions |
|---|---|---|---|---|---|---|
| EP1442830A1 | Composite part, method of assembling the composite part, fu… | Expired / Lapsed | 2004-01-28 | — | 10 | Details |
| JPH113374A | Netting processing judgment system | Expired / Lapsed | 1997-06-11 | — | 0 | Details |
| EP0683576A1 | An OFDM digital broadcasting system, and a transmission sys… | Expired / Lapsed | 1995-05-18 | — | 18 | Details |
| JPH05111689A | Sewage treating equipment | Expired / Lapsed | 1991-10-23 | — | 0 | Details |
| EP0441522A2 | Control device for an automobile | Expired / Lapsed | 1991-01-30 | — | 16 | Details |
| EP0451288A1 | Data collection/transmission device and data collection sys… | Expired / Lapsed | 1990-10-12 | — | 10 | Details |
| JPH0425755A | Oxygen sensor | Expired / Lapsed | 1990-05-22 | — | 0 | Details |
| EP0355797A2 | Signalling apparatus for use in an ATM switching system | Expired / Lapsed | 1989-08-22 | — | 24 | Details |
| EP0310120A2 | Electronic air-fuel ratio control apparatus in internal com… | Expired / Lapsed | 1988-09-30 | — | 21 | Details |
| JPH01244321A | Method for measuring temperature within living body | Expired / Lapsed | 1988-03-25 | — | 0 | Details |
| JPS6474089A | Method and device for controlling brushless motor having po… | Expired / Lapsed | 1987-09-11 | — | 0 | Details |
| JPS6433837A | Image correcting device for scanning type electron microsco… | Expired / Lapsed | 1987-07-29 | — | 0 | Details |
| EP0248274A2 | Plasma surface treatment method and apparatus | Expired / Lapsed | 1987-05-20 | — | 18 | Details |
| EP0214654A2 | Ultrasonic device for measuring acceleration of moving refl… | Expired / Lapsed | 1986-09-10 | — | 10 | Details |
| EP0214782A2 | Ultrasonic irradiation system | Expired / Lapsed | 1986-08-15 | — | 17 | Details |
| JPS6280950A | ion source | Expired / Lapsed | 1985-10-04 | — | 0 | Details |
| EP0175903A1 | Torque motor | Expired / Lapsed | 1985-08-13 | — | 8 | Details |
| EP0154335A2 | Magneto d.c. motor | Expired / Lapsed | 1985-03-06 | — | 11 | Details |
| JPS61196702A | Gas insulated compound switchgear for switchin station | Expired / Lapsed | 1985-02-27 | — | 0 | Details |
| JPS619601A | Optical lens | Expired / Lapsed | 1984-06-25 | — | 0 | Details |
| EP0099576A2 | Optical information processor | Expired / Lapsed | 1983-07-20 | — | 4 | Details |
| EP0099100A1 | Gate circuit of combined field-effect and bipolar transisto… | Expired / Lapsed | 1983-07-11 | — | 33 | Details |
| JPS59166137A | Endoscopic ultrasonic diagnostic apparatus | Expired / Lapsed | 1983-03-11 | — | 0 | Details |
| JPS5963732A | Thin film forming device | Expired / Lapsed | 1982-10-04 | — | 0 | Details |
| EP0075912A2 | Laser surgical equipment | Expired / Lapsed | 1982-09-27 | — | 15 | Details |
| JPS5946952A | Laser knife apparatus | Expired / Lapsed | 1982-09-13 | — | 0 | Details |
| JPS596759A | Rotor for magnet generator | Expired / Lapsed | 1982-06-30 | — | 0 | Details |
| JPS58200159A | How to install sound absorbing material for sonic probes | Expired / Lapsed | 1982-05-17 | — | 0 | Details |
| JPS5891692A | Semiconductor laser device | Expired / Lapsed | 1981-11-27 | — | 0 | Details |
| JPS5877679A | Ultrasonic measuring device for distance | Expired / Lapsed | 1981-11-02 | — | 0 | Details |
| JPS5862838A | Recording medium for optical disc | Expired / Lapsed | 1981-10-12 | — | 0 | Details |
| EP0046298A1 | Apparatus for measuring a magnetic field | Expired / Lapsed | 1981-08-17 | — | 9 | Details |
| EP0044572A1 | Apparatus for measuring the intensity of magnetic fields by… | Expired / Lapsed | 1981-07-23 | — | 6 | Details |
| GB2072407A | Automatic signal-source selection audio or video systems | Expired / Lapsed | 1981-03-16 | — | 16 | Details |
| JPS5720162A | Tachogenerator for controlling rotation of motor | Expired / Lapsed | 1980-07-09 | — | 0 | Details |
| JPS5690663A | Acceptance system for extension connection information | Expired / Lapsed | 1979-12-25 | — | 0 | Details |
| JPS5658249A | Package for integrated circuit | Expired / Lapsed | 1979-10-19 | — | 0 | Details |
| JPS5652575A | Sealing for runner of fluid machine | Expired / Lapsed | 1979-10-05 | — | 0 | Details |
| JPS5631907A | Automatic clamping and loosening method and apparatus for b… | Expired / Lapsed | 1979-08-22 | — | 0 | Details |
| JPS5631391A | Controlling device for commutatorless motor | Expired / Lapsed | 1979-08-20 | — | 0 | Details |
| JPS566022A | Engine controlling system | Expired / Lapsed | 1979-06-27 | — | 0 | Details |
| JPS564848A | Restart system for computer | Expired / Lapsed | 1979-06-22 | — | 0 | Details |
| JPS56257A | Amorphous alloy | Expired / Lapsed | 1979-06-13 | — | 0 | Details |
| GB2018422A | Mark detecting system | Expired / Lapsed | 1979-03-28 | — | 0 | Details |
| JPS55675A | Solid state color pickup device | Expired / Lapsed | 1979-01-22 | — | 0 | Details |
| JPS5594575A | Compact brushless motor | Expired / Lapsed | 1979-01-09 | — | 0 | Details |
| JPS5579725A | Alarm device for automobile | Expired / Lapsed | 1978-12-11 | — | 0 | Details |
| JPS5555557A | Dynamic memory cell | Expired / Lapsed | 1978-10-20 | — | 0 | Details |
| JPS54116610A | Hook shaped magnetic pole generator | Expired / Lapsed | 1978-03-03 | — | 0 | Details |
| JPS5459836A | Generating system for character pattern | Expired / Lapsed | 1977-10-21 | — | 0 | Details |
| JPS5338917A | Information transmission system | Expired / Lapsed | 1976-09-22 | — | 0 | Details |
| DE2640422A1 | METHOD AND DEVICE FOR CONNECTING OPTICAL FIBERS | Expired / Lapsed | 1976-09-08 | — | 0 | Details |
| JPS5332320A | Motor controller | Expired / Lapsed | 1976-09-06 | — | 0 | Details |
| JPS533207A | Head loading apparatus | Expired / Lapsed | 1976-06-29 | — | 0 | Details |
| JPS5249014A | Loading mechanism | Expired / Lapsed | 1975-10-17 | — | 0 | Details |
| JPS5233742A | Method of welding optical fibers by means of co2 laser | Expired / Lapsed | 1975-09-10 | — | 0 | Details |
| JPS5228338A | High output light beam focusing lens system | Expired / Lapsed | 1975-08-29 | — | 0 | Details |
| JPS5227922A | Operation diagnostic device for exhaust gas recirculation v… | Expired / Lapsed | 1975-08-27 | — | 0 | Details |
| JPS5225572A | Resin-seal type semiconductor device | Expired / Lapsed | 1975-08-22 | — | 0 | Details |
| JPS5224539A | Process for branching and constructing optical fibers, devi… | Expired / Lapsed | 1975-08-20 | — | 0 | Details |
| JPS52101A | System for transmitting acoustic sigal | Expired / Lapsed | 1975-06-23 | — | 0 | Details |
| JPS5169949A | JPS5169949A - - Google Patents | Expired / Lapsed | 1974-12-14 | — | 0 | Details |
| JPS511192A | Saibono ryoikiketsuteisochi | Expired / Lapsed | 1974-06-24 | — | 0 | Details |
| DE2307754A1 | Multilayer electrical conductors mfr. - by forming contacts… | Expired / Lapsed | 1973-02-16 | — | 0 | Details |
| DE2224590A1 | Clerk | Expired / Lapsed | 1972-05-19 | — | 0 | Details |
| DE2210159A1 | Method of fuel atomization and fuel atomization nozzle | Expired / Lapsed | 1972-03-02 | — | 0 | Details |
| DE2020830A1 | Interferometric spectrometer | Expired / Lapsed | 1970-04-28 | — | 0 | Details |
| US6516262B2 | Running control device for a vehicle | Expired / Lapsed | 2001-02-23 | 2003-02-04 | 18 | Details |
| US6454776B1 | Surgical operating apparatus | Expired / Lapsed | 2000-03-08 | 2002-09-24 | 10 | Details |
| US6208467B1 | Display apparatus for displaying an image having gradation | Expired / Lapsed | 2000-01-03 | 2001-03-27 | 45 | Details |
| US6014258A | Color image display apparatus and method | Expired / Lapsed | 1998-07-31 | 2000-01-11 | 29 | Details |
| US5655219A | Wireless LAN system capable of re-transmission under manage… | Expired / Lapsed | 1994-03-04 | 1997-08-05 | 30 | Details |
| US5540820A | Thin film forming method | Expired / Lapsed | 1993-06-15 | 1996-07-30 | 11 | Details |
| US5538494A | Radioactive beam irradiation method and apparatus taking mo… | Expired / Lapsed | 1995-03-17 | 1996-07-23 | 13 | Details |
| US5499342A | System for dynamically switching logical sessions between t… | Expired / Lapsed | 1992-05-01 | 1996-03-12 | 61 | Details |
| US5419320A | Method and apparatus for obtaining an image indicating meta… | Expired / Lapsed | 1993-10-21 | 1995-05-30 | 40 | Details |
| US5396361A | Frequency separation stabilization method for optical heter… | Expired / Lapsed | 1992-06-19 | 1995-03-07 | 29 | Details |
| US5381794A | Ultrasonic probe apparatus | Expired / Lapsed | 1993-01-21 | 1995-01-17 | 31 | Details |
| US5379451A | Mobile communication system and location registration metho… | Expired / Lapsed | 1992-11-06 | 1995-01-03 | 5 | Details |
| US5357749A | Apparatus for controlling exhaust concentration | Expired / Lapsed | 1992-05-14 | 1994-10-25 | 36 | Details |
| US5313948A | Ultrasonic diagnostic apparatus | Expired / Lapsed | 1992-11-25 | 1994-05-24 | 45 | Details |
| US4344327B1 | Electronic scanning ultrasonic diagnostic system | Expired / Lapsed | 1980-12-23 | 1994-05-03 | 0 | Details |
| US5243984A | Method and apparatus for determining biocurrent distributio… | Expired / Lapsed | 1992-08-13 | 1993-09-14 | 28 | Details |
| US5229762A | Gradation conversion system for converting color display da… | Expired / Lapsed | 1991-07-18 | 1993-07-20 | 12 | Details |
| US5210775A | π/4 shift QPSK modulator and communication apparatus | Expired / Lapsed | 1991-02-12 | 1993-05-11 | 16 | Details |
| US5196756A | Stack-type piezoelectric element, process for producing the… | Expired / Lapsed | 1990-08-29 | 1993-03-23 | 16 | Details |
| US5167659A | Blood coagulating apparatus | Expired / Lapsed | 1991-05-13 | 1992-12-01 | 19 | Details |
| US5158071A | Ultrasonic apparatus for therapeutical use | Expired / Lapsed | 1989-06-27 | 1992-10-27 | 5 | Details |
| US5152294A | Three-dimensional ultrasonic scanner | Expired / Lapsed | 1990-12-14 | 1992-10-06 | 20 | Details |
| US5153883A | Distributed timing signal generator | Expired / Lapsed | 1989-05-08 | 1992-10-06 | 26 | Details |
| US5144603A | Optical head incorporating refractive index distribution ch… | Expired / Lapsed | 1991-03-01 | 1992-09-01 | 18 | Details |
| US5144609A | Apparatus for tracking an optical disc | Expired / Lapsed | 1988-11-22 | 1992-09-01 | 20 | Details |
| US5140453A | Optical receiving method utilizing polarization diversity a… | Expired / Lapsed | 1988-03-11 | 1992-08-18 | 18 | Details |
| US5119314A | Semiconductor integrated circuit device | Expired / Lapsed | 1989-11-28 | 1992-06-02 | 9 | Details |
| US5116482A | Film forming system using high frequency power and power su… | Expired / Lapsed | 1990-09-24 | 1992-05-26 | 8 | Details |
| US5111323A | Optical switching system | Expired / Lapsed | 1989-05-30 | 1992-05-05 | 14 | Details |
| US5109382A | Method and apparatus for testing a memory | Expired / Lapsed | 1989-11-21 | 1992-04-28 | 10 | Details |
| US5105367A | Master slave manipulator system | Expired / Lapsed | 1989-10-16 | 1992-04-14 | 8 | Details |
| US4366479B1 | US4366479B1 - - Google Patents | Expired / Lapsed | 1981-02-06 | 1992-03-10 | 0 | Details |
| US4622977B1 | US4622977B1 - - Google Patents | Expired / Lapsed | 1984-11-28 | 1992-01-07 | 0 | Details |
| US5060045A | Semiconductor integrated circuit device and method of manuf… | Expired / Lapsed | 1989-10-17 | 1991-10-22 | 55 | Details |
| US4573477B1 | US4573477B1 - - Google Patents | Expired / Lapsed | 1983-04-21 | 1991-10-22 | 0 | Details |
| US5024094A | Ultrasonic imaging system of bonding zone | Expired / Lapsed | 1988-12-12 | 1991-06-18 | 14 | Details |
| US5018689A | Method and device for stopping vehicle at predetermined pos… | Expired / Lapsed | 1989-03-14 | 1991-05-28 | 12 | Details |
| US4989145A | Syntax analysis and language processing system | Expired / Lapsed | 1989-09-18 | 1991-01-29 | 18 | Details |
| US4985847A | Visual sensor system | Expired / Lapsed | 1988-01-13 | 1991-01-15 | 9 | Details |
| US4983038A | Sheath flow type flow-cell device | Expired / Lapsed | 1988-04-07 | 1991-01-08 | 26 | Details |
| US4975957A | Character voice communication system | Expired / Lapsed | 1989-04-24 | 1990-12-04 | 9 | Details |
| US4967299A | Thin-film magnetic head with a plurality of transducers | Expired / Lapsed | 1988-06-23 | 1990-10-30 | 9 | Details |
| US4961427A | Ultrasonic doppler diagnostic apparatus | Expired / Lapsed | 1988-10-24 | 1990-10-09 | 12 | Details |
| US4955386A | Pulse doppler flow speed meter | Expired / Lapsed | 1989-12-27 | 1990-09-11 | 11 | Details |
| US4956818A | Memory incorporating logic LSI and method for testing the s… | Expired / Lapsed | 1988-09-30 | 1990-09-11 | 16 | Details |
| US4950075A | Method of detecting an object by use of laser light and las… | Expired / Lapsed | 1989-05-02 | 1990-08-21 | 27 | Details |
| US4943938A | System for displaying shaded image of three-dimensional obj… | Expired / Lapsed | 1986-10-14 | 1990-07-24 | 5 | Details |
| US4942514A | Process monitoring and control system and method of process… | Expired / Lapsed | 1988-11-09 | 1990-07-17 | 48 | Details |
| US4920518A | Semiconductor integrated circuit with nonvolatile memory | Expired / Lapsed | 1989-03-28 | 1990-04-24 | 11 | Details |
| US4912934A | Hermetically closed circulation type, vapor absorption refr… | Expired / Lapsed | 1988-10-05 | 1990-04-03 | 20 | Details |
| US4913883A | Particle agglutination immunoassay apparatus | Expired / Lapsed | 1988-07-20 | 1990-04-03 | 12 | Details |
| US4912674A | Read-only memory | Expired / Lapsed | 1989-02-14 | 1990-03-27 | 26 | Details |
| US4904366A | Instrument for determination of the base sequence of nuclei… | Expired / Lapsed | 1987-12-04 | 1990-02-27 | 11 | Details |
| US4899280A | Adaptive system for controlling an engine according to cond… | Expired / Lapsed | 1988-04-08 | 1990-02-06 | 13 | Details |
| US4887222A | Method for controlling operation of industrial robot | Expired / Lapsed | 1988-06-29 | 1989-12-12 | 6 | Details |
| US4885681A | I/O Execution method for a virtual machine system and syste… | Expired / Lapsed | 1985-01-16 | 1989-12-05 | 15 | Details |
| US4879703A | Magneto-optic memory apparatus with defect detection of rec… | Expired / Lapsed | 1987-07-08 | 1989-11-07 | 17 | Details |
| US4875456A | Self-diagnosis system for auxiliary air control system of i… | Expired / Lapsed | 1989-02-08 | 1989-10-24 | 23 | Details |
| US4862440A | Optical head with optical beam control using acoustic wave … | Expired / Lapsed | 1987-09-09 | 1989-08-29 | 15 | Details |
| US4852001A | Job scheduling method and system | Expired / Lapsed | 1987-07-17 | 1989-07-25 | 8 | Details |
| US4844077A | NMR imaging method | Expired / Lapsed | 1988-03-14 | 1989-07-04 | 12 | Details |
| US4841491A | Ultrasonic beam former | Expired / Lapsed | 1986-08-04 | 1989-06-20 | 16 | Details |
| US4839798A | Method and apparatus for controlling job transfer between c… | Expired / Lapsed | 1985-11-06 | 1989-06-13 | 13 | Details |
| US4837698A | Method of controlling air-fuel ratio | Expired / Lapsed | 1987-10-26 | 1989-06-06 | 22 | Details |
| US4837734A | Method and apparatus for master-slave manipulation suppleme… | Expired / Lapsed | 1987-02-26 | 1989-06-06 | 17 | Details |
| US4832430A | Optical switch | Expired / Lapsed | 1987-01-29 | 1989-05-23 | 17 | Details |
| US4829950A | Valve lifter and method of producing the same | Expired / Lapsed | 1987-04-30 | 1989-05-16 | 5 | Details |
| US4822989A | Semiconductor device and method of manufacturing thereof | Expired / Lapsed | 1987-05-21 | 1989-04-18 | 47 | Details |
| US4817052A | Semiconductor memory with an improved dummy cell arrangemen… | Expired / Lapsed | 1987-04-10 | 1989-03-28 | 15 | Details |
| US4812967A | Method and apparatus for controlling interrupts in a virtua… | Expired / Lapsed | 1986-03-07 | 1989-03-14 | 8 | Details |
| US4803431A | Method for imaging three-dimensional moving object | Expired / Lapsed | 1987-07-21 | 1989-02-07 | 6 | Details |
| US4803674A | Magneto-optical recorder with small-sized, low-powered elec… | Expired / Lapsed | 1986-11-20 | 1989-02-07 | 24 | Details |
| US4799490A | Doppler ultrasonic diagnostic apparatus | Expired / Lapsed | 1987-03-02 | 1989-01-24 | 6 | Details |
| US4799469A | Apparatus and method for controlling ignition timing for in… | Expired / Lapsed | 1987-01-05 | 1989-01-24 | 13 | Details |
| US4793359A | Centering balloon structure for transluminal angioplasty ca… | Expired / Lapsed | 1987-04-24 | 1988-12-27 | 12 | Details |
| US4794547A | Robot control system | Expired / Lapsed | 1986-08-15 | 1988-12-27 | 12 | Details |
| US4784451A | Waveguide optical switches | Expired / Lapsed | 1985-08-05 | 1988-11-15 | 9 | Details |
| US4783833A | Method of extracting an image of a moving object | Expired / Lapsed | 1986-11-26 | 1988-11-08 | 10 | Details |
| US4777330A | Network system diagnosis system | Expired / Lapsed | 1987-10-01 | 1988-10-11 | 30 | Details |
| US4775967A | Beam spot control device using a thin micro lens with an ac… | Expired / Lapsed | 1985-10-11 | 1988-10-04 | 24 | Details |
| US4769782A | Automatic system for prioritized selection of a magnetic ta… | Expired / Lapsed | 1983-07-20 | 1988-09-06 | 7 | Details |
| US4759958A | Method for forming polyimide film by chemical vapor deposit… | Expired / Lapsed | 1987-07-23 | 1988-07-26 | 8 | Details |
| US4759948A | Film formation through co-deposition with high and low ener… | Expired / Lapsed | 1987-01-29 | 1988-07-26 | 16 | Details |
| US4751847A | Ultrasonic velocity meter | Expired / Lapsed | 1987-01-22 | 1988-06-21 | 11 | Details |
| US4751557A | Dram with FET stacked over capacitor | Expired / Lapsed | 1986-09-08 | 1988-06-14 | 12 | Details |
| US4745458A | Television signal processing system | Expired / Lapsed | 1985-11-19 | 1988-05-17 | 6 | Details |
| US4745319A | Magneto D.C. motor having elastic magnet mounting retainers | Expired / Lapsed | 1985-03-01 | 1988-05-17 | 6 | Details |
| US4742218A | Focus error detection apparatus utilizing focusing an front… | Expired / Lapsed | 1986-02-11 | 1988-05-03 | 15 | Details |
| US4740939A | Apparatus for reproducing information recorded on a disk | Expired / Lapsed | 1986-05-21 | 1988-04-26 | 4 | Details |
| US4740948A | Disc cartridge | Expired / Lapsed | 1986-05-09 | 1988-04-26 | 26 | Details |
| US4736631A | Ultrasonic probes | Expired / Lapsed | 1986-09-04 | 1988-04-12 | 8 | Details |
| US4730289A | Magnetic-optical disc memory system and apparatus for switc… | Expired / Lapsed | 1986-01-14 | 1988-03-08 | 5 | Details |
| US4729938A | Optical disc base plate having a primer layer formed of an … | Expired / Lapsed | 1985-11-08 | 1988-03-08 | 18 | Details |
| US4715344A | Learning and control apparatus for electronically controlle… | Expired / Lapsed | 1986-08-01 | 1987-12-29 | 14 | Details |
| US4709231A | Shading apparatus for displaying three dimensional objects | Expired / Lapsed | 1985-08-19 | 1987-11-24 | 10 | Details |
| US4709342A | Tactile sensing apparatus | Expired / Lapsed | 1984-07-31 | 1987-11-24 | 15 | Details |
| US4707621A | Multiplex control apparatus having middle value selection c… | Expired / Lapsed | 1986-04-24 | 1987-11-17 | 20 | Details |
| US4707630A | Magnetic cover member for magnetic poles of DC motor | Expired / Lapsed | 1986-01-06 | 1987-11-17 | 7 | Details |
| US4702556A | Method of assembling a light emitting device with an optica… | Expired / Lapsed | 1984-08-22 | 1987-10-27 | 16 | Details |
| US4701922A | Integrated circuit device | Expired / Lapsed | 1985-08-26 | 1987-10-20 | 14 | Details |
| US4697128A | Control apparatus for a rotor supported by an electromagnet… | Expired / Lapsed | 1986-05-08 | 1987-09-29 | 6 | Details |
| US4689652A | Image sensor | Expired / Lapsed | 1985-03-11 | 1987-08-25 | 12 | Details |
| US4683396A | Composite ultrasonic transducers and methods for making same | Expired / Lapsed | 1984-10-17 | 1987-07-28 | 21 | Details |
| US4680785A | Personal-signaling communication system | Expired / Lapsed | 1984-10-03 | 1987-07-14 | 5 | Details |
| US4679147A | Navigation system with capability of instructing running di… | Expired / Lapsed | 1985-03-25 | 1987-07-07 | 8 | Details |
| US4675983A | Method of making a semiconductor including forming graft/ex… | Expired / Lapsed | 1985-06-05 | 1987-06-30 | 32 | Details |
| US4668970A | Semiconductor device | Expired / Lapsed | 1985-12-02 | 1987-05-26 | 8 | Details |
| US4667997A | Grip device | Expired / Lapsed | 1985-10-28 | 1987-05-26 | 14 | Details |
| US4665282A | Tablet type coordinate input apparatus using elastic wave | Expired / Lapsed | 1985-07-24 | 1987-05-12 | 24 | Details |
| US4664601A | Operation control system of rotary displacement type vacuum… | Expired / Lapsed | 1985-07-23 | 1987-05-12 | 11 | Details |
| US4663644A | Semiconductor device and method of manufacturing the same | Expired / Lapsed | 1984-12-26 | 1987-05-05 | 19 | Details |
| US4659587A | Electroless plating process and process for producing multi… | Expired / Lapsed | 1985-10-10 | 1987-04-21 | 19 | Details |
| US4658176A | Ultrasonic transducer using piezoelectric composite | Expired / Lapsed | 1985-07-23 | 1987-04-14 | 9 | Details |
| US4653029A | MOS amplifier and semiconductor memory using the same | Expired / Lapsed | 1985-04-08 | 1987-03-24 | 18 | Details |
| US4651284A | Method and system of circuit pattern understanding and layo… | Expired / Lapsed | 1985-07-26 | 1987-03-17 | 13 | Details |
| US4649377A | Split image display control unit | Expired / Lapsed | 1984-05-23 | 1987-03-10 | 5 | Details |
| US4644465A | Apparatus for controlling I/O interrupt in multiprocessor s… | Expired / Lapsed | 1984-06-21 | 1987-02-17 | 4 | Details |
| US4641668A | Ultrasonic blood flow imaging method and apparatus | Expired / Lapsed | 1985-08-19 | 1987-02-10 | 5 | Details |
| US4641237A | Bus control method and apparatus | Expired / Lapsed | 1983-09-07 | 1987-02-03 | 8 | Details |
| US4638438A | Navigation apparatus for automotive | Expired / Lapsed | 1984-05-22 | 1987-01-20 | 6 | Details |
| US4630252A | Control apparatus for optical disc player for locating blan… | Expired / Lapsed | 1983-12-23 | 1986-12-16 | 8 | Details |
| US4628531A | Pattern checking apparatus | Expired / Lapsed | 1984-02-27 | 1986-12-09 | 10 | Details |
| US4626897A | Optical filter for color imaging device | Expired / Lapsed | 1983-05-13 | 1986-12-02 | 14 | Details |
| US4624896A | Multi-layer ceramic substrate and method for the production… | Expired / Lapsed | 1984-07-05 | 1986-11-25 | 8 | Details |
| US4622564A | Optical information recording apparatus | Expired / Lapsed | 1984-12-14 | 1986-11-11 | 18 | Details |
| US4615173A | Exhaust emission control apparatus for diesel engine | Expired / Lapsed | 1984-11-02 | 1986-10-07 | 14 | Details |
| US4615000A | Pulse width modulation inverter system | Expired / Lapsed | 1985-01-18 | 1986-09-30 | 21 | Details |
| US4615005A | Data processing apparatus with clock signal control by micr… | Expired / Lapsed | 1984-07-20 | 1986-09-30 | 36 | Details |
| US4614432A | Pattern detector | Expired / Lapsed | 1983-10-26 | 1986-09-30 | 20 | Details |
| US4612487A | System and method for controlling an industrial robot | Expired / Lapsed | 1984-07-31 | 1986-09-16 | 15 | Details |
| US4604716A | Method and apparatus for controlling a robot | Expired / Lapsed | 1983-12-07 | 1986-08-05 | 17 | Details |
| US4599135A | Thin film deposition | Expired / Lapsed | 1984-09-28 | 1986-07-08 | 31 | Details |
| US4592237A | Method of selecting composite reception signal in ultrasoni… | Expired / Lapsed | 1984-05-14 | 1986-06-03 | 8 | Details |
| US4589007A | Semiconductor integrated circuit device | Expired / Lapsed | 1983-09-06 | 1986-05-13 | 16 | Details |
| US4586335A | Actuator | Expired / Lapsed | 1984-10-12 | 1986-05-06 | 18 | Details |
| US4573477A | Ultrasonic diagnostic apparatus | Expired / Lapsed | 1983-04-21 | 1986-03-04 | 3 | Details |
| US4566459A | Ultrasonic diagnosis system | Expired / Lapsed | 1984-02-14 | 1986-01-28 | 14 | Details |
| US4566765A | Apparatus for summing several ring-shape laser beams | Expired / Lapsed | 1983-10-13 | 1986-01-28 | 17 | Details |
| US4564572A | Process for forming pattern | Expired / Lapsed | 1985-01-24 | 1986-01-14 | 13 | Details |
| US4564929A | Information recording and reproducing apparatus with tracki… | Expired / Lapsed | 1982-11-23 | 1986-01-14 | 19 | Details |
| US4561084A | Disk loading and unloading system | Expired / Lapsed | 1983-06-06 | 1985-12-24 | 12 | Details |
| US4559255A | Acoustical absorbing material | Expired / Lapsed | 1984-12-21 | 1985-12-17 | 8 | Details |
| US4559633A | Spread spectrum system | Expired / Lapsed | 1983-10-14 | 1985-12-17 | 13 | Details |
| US4558378A | Method and apparatus for a magnetic recording/reproducing | Expired / Lapsed | 1983-08-17 | 1985-12-10 | 43 | Details |
| US4554652A | Optical information processor | Expired / Lapsed | 1983-04-29 | 1985-11-19 | 8 | Details |
| US4550386A | Terminal controller | Expired / Lapsed | 1983-12-20 | 1985-10-29 | 10 | Details |
| US4550437A | Apparatus for parallel processing of local image data | Expired / Lapsed | 1982-06-17 | 1985-10-29 | 19 | Details |
| US4549208A | Picture processing apparatus | Expired / Lapsed | 1983-12-21 | 1985-10-22 | 9 | Details |
| US4547852A | Engine control apparatus and control method | Expired / Lapsed | 1983-02-10 | 1985-10-15 | 10 | Details |
| US4545741A | Vertical motor pump | Expired / Lapsed | 1983-05-09 | 1985-10-08 | 3 | Details |
| US4542479A | Distributed control system | Expired / Lapsed | 1982-04-14 | 1985-09-17 | 6 | Details |
| US4540856A | Remote control system | Expired / Lapsed | 1983-05-31 | 1985-09-10 | 11 | Details |
| US4537873A | Catalyst for catalytic combustion | Expired / Lapsed | 1983-11-29 | 1985-08-27 | 20 | Details |
| US4528634A | Bit pattern generator | Expired / Lapsed | 1982-10-08 | 1985-07-09 | 7 | Details |
| US4525265A | Electrochemical sensor capable of determining hydrogen pero… | Expired / Lapsed | 1984-01-19 | 1985-06-25 | 13 | Details |
| US4503599A | Method of fabricating field effect transistors | Expired / Lapsed | 1983-01-28 | 1985-03-12 | 20 | Details |
| US4497577A | Steam wetness measuring apparatus | Expired / Lapsed | 1982-05-28 | 1985-02-05 | 9 | Details |
| US4495218A | Process for forming thin film | Expired / Lapsed | 1983-09-22 | 1985-01-22 | 11 | Details |
| US4494113A | Method and apparatus for self-control in distributed priori… | Expired / Lapsed | 1982-03-10 | 1985-01-15 | 11 | Details |
| US4491958A | Speech synthesizer | Expired / Lapsed | 1981-02-17 | 1985-01-01 | 2 | Details |
| US4484653A | Automatic driving wheel change-over apparatus | Expired / Lapsed | 1982-06-10 | 1984-11-27 | 4 | Details |
| US4484347A | Method of image transformation in a display device | Expired / Lapsed | 1982-02-16 | 1984-11-20 | 22 | Details |
| US4481229A | Method for growing silicon-including film by employing plas… | Expired / Lapsed | 1983-06-20 | 1984-11-06 | 16 | Details |
| US4481573A | Shared virtual address translation unit for a multiprocesso… | Expired / Lapsed | 1981-11-13 | 1984-11-06 | 10 | Details |
| US4472973A | Ultrasonic flaw detecting apparatus of electronically scann… | Expired / Lapsed | 1982-06-18 | 1984-09-25 | 15 | Details |
| US4473750A | Three-dimensional shape measuring device | Expired / Lapsed | 1981-07-24 | 1984-09-25 | 18 | Details |
| US4467370A | PCM Recorder with pause controlled signal rearranging | Expired / Lapsed | 1981-09-23 | 1984-08-21 | 14 | Details |
| US4459534A | Method for controlling induction motor and apparatus theref… | Expired / Lapsed | 1982-05-24 | 1984-07-10 | 13 | Details |
| US4455619A | Interactive equipment for computer programming by linkage o… | Expired / Lapsed | 1981-05-29 | 1984-06-19 | 7 | Details |
| US4453125A | Microwave alcohol fuel sensor | Expired / Lapsed | 1982-07-13 | 1984-06-05 | 18 | Details |
| US4451771A | Apparatus for controlling AC motor | Expired / Lapsed | 1983-01-14 | 1984-05-29 | 6 | Details |
| US4450719A | Air flow meter | Expired / Lapsed | 1982-10-13 | 1984-05-29 | 12 | Details |
| US4451551A | Radiation-sensitive poly(amic acid) polymer composition | Expired / Lapsed | 1981-12-17 | 1984-05-29 | 22 | Details |
| US4448236A | Apparatus for producing thin metal sheet | Expired / Lapsed | 1982-03-16 | 1984-05-15 | 20 | Details |
| US4444197A | Ultrasonic diagnostic probe scanner | Expired / Lapsed | 1982-03-25 | 1984-04-24 | 9 | Details |
| US4443718A | Nonvolatile semiconductor memory with stabilized level shif… | Expired / Lapsed | 1980-09-19 | 1984-04-17 | 11 | Details |
| US4438366A | Cathode-ray tube driving apparatus | Expired / Lapsed | 1981-07-22 | 1984-03-20 | 17 | Details |
| US4435704A | Loop transmission system | Expired / Lapsed | 1982-03-08 | 1984-03-06 | 17 | Details |
| US4435835A | Method and device for detecting the position of an object | Expired / Lapsed | 1981-03-24 | 1984-03-06 | 8 | Details |
| US4434429A | Information recording member and method of fabricating the … | Expired / Lapsed | 1981-10-15 | 1984-02-28 | 44 | Details |
| US4434464A | Memory protection system for effecting alteration of protec… | Expired / Lapsed | 1981-03-31 | 1984-02-28 | 14 | Details |
| US4432091A | Semiconductor laser device | Expired / Lapsed | 1982-01-25 | 1984-02-14 | 4 | Details |
| US4423318A | Transaction processing system | Expired / Lapsed | 1982-04-16 | 1983-12-27 | 8 | Details |
| US4423331A | Method and apparatus for inspecting specimen surface | Expired / Lapsed | 1981-03-11 | 1983-12-27 | 7 | Details |
| US4410985A | Data transmission system and method | Expired / Lapsed | 1981-03-25 | 1983-10-18 | 23 | Details |
| US4410969A | Optical information playback apparatus | Expired / Lapsed | 1980-12-16 | 1983-10-18 | 9 | Details |
| US4404233A | Ion implanting method | Expired / Lapsed | 1981-01-13 | 1983-09-13 | 7 | Details |
| US4404659A | Programmable read only memory | Expired / Lapsed | 1980-10-03 | 1983-09-13 | 13 | Details |
| US4403322A | Voice signal converting device | Expired / Lapsed | 1981-07-02 | 1983-09-06 | 13 | Details |
| US4401387A | Nephelometric immunoassay and nephelometer | Expired / Lapsed | 1981-08-18 | 1983-08-30 | 23 | Details |
| US4401365A | Rotary type optical switch | Expired / Lapsed | 1981-02-06 | 1983-08-30 | 3 | Details |
| US4396344A | Industrial robot of the articulated type | Expired / Lapsed | 1980-10-10 | 1983-08-02 | 23 | Details |
| US4389711A | Touch sensitive tablet using force detection | Expired / Lapsed | 1980-08-11 | 1983-06-21 | 12 | Details |
| US4387987A | Method of producing solid-state color imaging devices | Expired / Lapsed | 1981-05-22 | 1983-06-14 | 13 | Details |
| US4388342A | Method for chemical vapor deposition | Expired / Lapsed | 1980-05-28 | 1983-06-14 | 14 | Details |
| US4384695A | Control method for stopping train at target point | Expired / Lapsed | 1980-07-10 | 1983-05-24 | 14 | Details |
| US4385351A | Multiprocessor system with apparatus for propagating cache … | Expired / Lapsed | 1980-04-03 | 1983-05-24 | 27 | Details |
| US4373161A | Doppler radar mounting structure for motor vehicles | Expired / Lapsed | 1980-08-21 | 1983-02-08 | 9 | Details |
| US4367591A | Fitting device | Expired / Lapsed | 1980-09-08 | 1983-01-11 | 15 | Details |
| US4367426A | Ceramic transparent piezoelectric transducer | Expired / Lapsed | 1981-03-19 | 1983-01-04 | 11 | Details |
| US4364276A | Differential pressure measuring transducer assembly | Expired / Lapsed | 1980-12-16 | 1982-12-21 | 13 | Details |
| US4363935A | Mobile radio telephone system | Expired / Lapsed | 1980-06-04 | 1982-12-14 | 7 | Details |
| US4362599A | Method for making semiconductor device | Expired / Lapsed | 1981-02-23 | 1982-12-07 | 11 | Details |
| US4356437A | Control circuit for DC motors | Expired / Lapsed | 1980-07-17 | 1982-10-26 | 17 | Details |
| US4353255A | Method for determining shape of crack | Expired / Lapsed | 1981-01-02 | 1982-10-12 | 7 | Details |
| US4354267A | Data transmission system utilizing loop transmission lines … | Expired / Lapsed | 1980-05-14 | 1982-10-12 | 10 | Details |
| US4348731A | Automatic working apparatus and method of controlling the s… | Expired / Lapsed | 1979-04-18 | 1982-09-07 | 18 | Details |
| US4347564A | Hierarchical-structure plant control system | Expired / Lapsed | 1980-06-25 | 1982-08-31 | 7 | Details |
| US4346395A | Light detecting photodiode-MIS transistor device | Expired / Lapsed | 1980-03-26 | 1982-08-24 | 11 | Details |
| US4344327A | Electronic scanning ultrasonic diagnostic system | Expired / Lapsed | 1980-12-23 | 1982-08-17 | 4 | Details |
| US4343553A | Shape testing apparatus | Expired / Lapsed | 1980-08-27 | 1982-08-10 | 7 | Details |
| US4342231A | Differential pressure transmitter | Expired / Lapsed | 1980-12-16 | 1982-08-03 | 13 | Details |
| US4339717A | Nuclear magnetic resonance spectrometer | Expired / Lapsed | 1978-12-08 | 1982-07-13 | 3 | Details |
| US4336475A | Slotless brushless motor | Expired / Lapsed | 1979-08-14 | 1982-06-22 | 15 | Details |
| US4334241A | Pattern position detecting system | Expired / Lapsed | 1980-04-14 | 1982-06-08 | 8 | Details |
| US4331280A | Method of jointing pipes by friction welding | Expired / Lapsed | 1980-12-30 | 1982-05-25 | 8 | Details |
| US4328531A | Thick film multilayer substrate | Expired / Lapsed | 1980-03-27 | 1982-05-04 | 2 | Details |
| US4321319A | Photosensitive compositions containing polyamides acid with… | Expired / Lapsed | 1980-05-22 | 1982-03-23 | 9 | Details |
| US4319397A | Method of producing semiconductor displacement transducer | Expired / Lapsed | 1980-07-07 | 1982-03-16 | 20 | Details |
| US4306460A | Differential pressure transducer | Expired / Lapsed | 1979-12-13 | 1981-12-22 | 16 | Details |
| US4305133A | Recursive type digital filter | Expired / Lapsed | 1979-11-16 | 1981-12-08 | 13 | Details |
| US4300629A | Cross-fin tube type heat exchanger | Expired / Lapsed | 1979-06-20 | 1981-11-17 | 29 | Details |
| US4299873A | Multilayer circuit board | Expired / Lapsed | 1980-04-07 | 1981-11-10 | 17 | Details |
| US4296436A | Noise reducing system | Expired / Lapsed | 1979-08-21 | 1981-10-20 | 6 | Details |
| US4294697A | Apparatus for treatment of sewage | Expired / Lapsed | 1979-07-25 | 1981-10-13 | 14 | Details |
| US4295115A | Semiconductor absolute pressure transducer assembly and met… | Expired / Lapsed | 1979-04-04 | 1981-10-13 | 15 | Details |
| US4293944A | Information play-back apparatus with astigmatic auto-focusi… | Expired / Lapsed | 1977-06-27 | 1981-10-06 | 13 | Details |
| US4289822A | Light-sensitive film | Expired / Lapsed | 1979-06-15 | 1981-09-15 | 35 | Details |
| US4283601A | Preprocessing method and device for speech recognition devi… | Expired / Lapsed | 1979-05-08 | 1981-08-11 | 8 | Details |
| US4279985A | Photopolymer imaging using epoxy and bromine containing eth… | Expired / Lapsed | 1979-04-27 | 1981-07-21 | 11 | Details |
| US4277175A | Method and apparatus for inspecting printed wiring boards | Expired / Lapsed | 1979-09-11 | 1981-07-07 | 11 | Details |
| US4275321A | Drip-proof type electrical rotating machine | Expired / Lapsed | 1978-08-23 | 1981-06-23 | 7 | Details |
| US4272832A | Semiconductor memory device | Expired / Lapsed | 1979-05-23 | 1981-06-09 | 7 | Details |
| US4270134A | Light-emitting semiconductor device | Expired / Lapsed | 1979-04-30 | 1981-05-26 | 12 | Details |
| US4259743A | Transmit/receive microwave circuit | Expired / Lapsed | 1978-12-01 | 1981-03-31 | 6 | Details |
| US4255686A | Storage type photosensor containing silicon and hydrogen | Expired / Lapsed | 1979-05-16 | 1981-03-10 | 10 | Details |
| US4251691A | Picture/audio signal transmission system | Expired / Lapsed | 1978-12-01 | 1981-02-17 | 6 | Details |
| US4249213A | Picture-in-picture television receiver | Expired / Lapsed | 1979-09-11 | 1981-02-03 | 15 | Details |
| US4242702A | Apparatus for automatically checking external appearance of… | Expired / Lapsed | 1977-11-30 | 1980-12-30 | 26 | Details |
| US4242694A | Solid-state color imaging device | Expired / Lapsed | 1977-09-12 | 1980-12-30 | 31 | Details |
| US4239124A | Fluid-tight closure apparatus | Expired / Lapsed | 1978-10-20 | 1980-12-16 | 18 | Details |
| US4239985A | Trigger circuit for a thyristor | Expired / Lapsed | 1978-03-28 | 1980-12-16 | 14 | Details |
| US4238803A | Information recording methods using lasers | Expired / Lapsed | 1977-09-01 | 1980-12-09 | 37 | Details |
| US4229235A | Heat-treating method for pipes | Expired / Lapsed | 1977-10-25 | 1980-10-21 | 28 | Details |
| US4218283A | Method for fabricating semiconductor device and etchant for… | Expired / Lapsed | 1978-07-12 | 1980-08-19 | 57 | Details |
| US4214305A | Multi-processor data processing system | Expired / Lapsed | 1978-06-20 | 1980-07-22 | 8 | Details |
| US4205377A | Control system for internal combustion engine | Expired / Lapsed | 1978-04-24 | 1980-05-27 | 12 | Details |
| US4203025A | Thick-film thermal printing head | Expired / Lapsed | 1978-08-17 | 1980-05-13 | 21 | Details |
| US4200869A | Data display control system with plural refresh memories | Expired / Lapsed | 1978-02-14 | 1980-04-29 | 6 | Details |
| US4199820A | Random access storage apparatus with a movable recording me… | Expired / Lapsed | 1978-12-18 | 1980-04-22 | 8 | Details |
| US4190759A | Processing of photomask | Expired / Lapsed | 1978-07-06 | 1980-02-26 | 11 | Details |
| US4161651A | Simultaneously sampled remote data reading and transmission… | Expired / Lapsed | 1978-03-02 | 1979-07-17 | 9 | Details |
| US4161701A | Semiconductor laser | Expired / Lapsed | 1977-03-24 | 1979-07-17 | 9 | Details |
| US4161040A | Data-in amplifier for an MISFET memory device having a clam… | Expired / Lapsed | 1977-05-20 | 1979-07-10 | 27 | Details |
| US4158545A | Automatic chemical analyzing method and apparatus | Expired / Lapsed | 1977-09-20 | 1979-06-19 | 18 | Details |
| US4156928A | Programmable television game and training system with adapt… | Expired / Lapsed | 1977-04-22 | 1979-05-29 | 4 | Details |
| US4155006A | Driver circuit for a solid-state imaging device | Expired / Lapsed | 1978-01-06 | 1979-05-15 | 5 | Details |
| US4153897A | Method and device for detecting the similarity between stan… | Expired / Lapsed | 1977-07-14 | 1979-05-08 | 14 | Details |
| US4153334A | Stereoscopic image observing apparatus | Expired / Lapsed | 1977-06-01 | 1979-05-08 | 8 | Details |
| US4153371A | Method and apparatus for reduction-projection type mask ali… | Expired / Lapsed | 1977-02-23 | 1979-05-08 | 11 | Details |
| US4153198A | Electro-hydraulic governor employing duplex digital control… | Expired / Lapsed | 1977-02-01 | 1979-05-08 | 32 | Details |
| US4152763A | Control system for central processing unit with plural exec… | Expired / Lapsed | 1976-02-18 | 1979-05-01 | 8 | Details |
| US4149171A | Thermal recording method | Expired / Lapsed | 1978-01-24 | 1979-04-10 | 4 | Details |
| US4145643A | Control apparatus for driving a pulse motor | Expired / Lapsed | 1977-05-17 | 1979-03-20 | 12 | Details |
| US4143242A | Analog-digital code converter in a digital telephone switch… | Expired / Lapsed | 1977-07-13 | 1979-03-06 | 9 | Details |
| US4143310A | Apparatus for positioning | Expired / Lapsed | 1976-12-01 | 1979-03-06 | 20 | Details |
| US4136959A | Method for analyzing one ingredient of a three ingredient m… | Expired / Lapsed | 1977-01-28 | 1979-01-30 | 2 | Details |
| US4136929A | Apparatus for generating light pulse train | Expired / Lapsed | 1975-11-25 | 1979-01-30 | 53 | Details |
| US4136384A | Loop type data highway system | Expired / Lapsed | 1977-03-24 | 1979-01-23 | 6 | Details |
| US4129858A | Partitioned display control system | Expired / Lapsed | 1977-03-23 | 1978-12-12 | 9 | Details |
| US4129859A | Raster scan type CRT display system having an image rolling… | Expired / Lapsed | 1977-02-08 | 1978-12-12 | 7 | Details |
| US4128762A | Apparatus for measuring mechanical stress using white X-rays | Expired / Lapsed | 1977-07-06 | 1978-12-05 | 11 | Details |
| US4123316A | Plasma processor | Expired / Lapsed | 1976-10-06 | 1978-10-31 | 37 | Details |
| US4122449A | Device for measuring a vehicle speed by utilizing the doppl… | Expired / Lapsed | 1977-05-16 | 1978-10-24 | 8 | Details |
| US4110781A | Bidirectional grooved thyristor fired by activation of the … | Expired / Lapsed | 1976-10-05 | 1978-08-29 | 26 | Details |
| US4104733A | Address selecting circuitry for semiconductor memory device | Expired / Lapsed | 1977-08-15 | 1978-08-01 | 11 | Details |
| US4101879A | Cursor movement control device for screen-segmented display… | Expired / Lapsed | 1976-12-13 | 1978-07-18 | 10 | Details |
| US4100562A | Light coupled semiconductor device and method of manufactur… | Expired / Lapsed | 1976-04-19 | 1978-07-11 | 20 | Details |
| US4100310A | Method of doping inpurities | Expired / Lapsed | 1976-01-14 | 1978-07-11 | 18 | Details |
| US4098623A | Method for heat treatment of titanium alloy | Expired / Lapsed | 1976-07-27 | 1978-07-04 | 12 | Details |
| US4095905A | Surface-defect detecting device | Expired / Lapsed | 1976-08-17 | 1978-06-20 | 31 | Details |
| US4093897A | Electric motor | Expired / Lapsed | 1976-10-22 | 1978-06-06 | 17 | Details |
| US4092213A | Control rod drives for nuclear reactors | Expired / Lapsed | 1976-03-30 | 1978-05-30 | 47 | Details |
| US4091391A | Drive system for thermal recording apparatus | Expired / Lapsed | 1977-03-29 | 1978-05-23 | 13 | Details |
| US4088838A | Voice response system | Expired / Lapsed | 1976-12-20 | 1978-05-09 | 16 | Details |
| US4089021A | Semiconductor device capable of withstanding high voltage a… | Expired / Lapsed | 1976-12-03 | 1978-05-09 | 16 | Details |
| US4082457A | Leukocyte detector | Expired / Lapsed | 1976-03-08 | 1978-04-04 | 2 | Details |
| US4081509A | Method for removing nitrogen oxides from flue gas by absorp… | Expired / Lapsed | 1976-03-19 | 1978-03-28 | 20 | Details |
| US4079803A | Electromagnetic guidance system | Expired / Lapsed | 1977-01-04 | 1978-03-21 | 5 | Details |
| US4074231A | Pattern processing system | Expired / Lapsed | 1976-12-09 | 1978-02-14 | 6 | Details |
| US4070416A | Novel thermosetting resin and a process for producing same | Expired / Lapsed | 1975-08-18 | 1978-01-24 | 55 | Details |
| US4068303A | Address translation managing system with translation pair p… | Expired / Lapsed | 1976-03-22 | 1978-01-10 | 12 | Details |
| US4064484A | Analog-digital converter with variable threshold levels | Expired / Lapsed | 1976-07-26 | 1977-12-20 | 11 | Details |
| US4063118A | MIS decoder providing non-floating outputs with short acces… | Expired / Lapsed | 1976-05-25 | 1977-12-13 | 11 | Details |
| US4060740A | Sensing amplifier for capacitive MISFET memory | Expired / Lapsed | 1976-05-12 | 1977-11-29 | 17 | Details |
| US4060804A | Ink jet recording method and apparatus | Expired / Lapsed | 1976-01-30 | 1977-11-29 | 15 | Details |
| US4058821A | Photo-coupler semiconductor device and method of manufactur… | Expired / Lapsed | 1976-03-19 | 1977-11-15 | 22 | Details |
| US4057845A | Group control system for visual information processing | Expired / Lapsed | 1976-04-06 | 1977-11-08 | 11 | Details |
| US4056844A | Memory control system using plural buffer address arrays | Expired / Lapsed | 1975-10-08 | 1977-11-01 | 9 | Details |
| US4051528A | Apparatus for optically reconstructing information | Expired / Lapsed | 1976-02-26 | 1977-09-27 | 13 | Details |
| US4051457A | System for generating a character pattern | Expired / Lapsed | 1976-02-03 | 1977-09-27 | 10 | Details |
| US4049476A | Method of manufacturing a semiconductor integrated circuit … | Expired / Lapsed | 1975-09-29 | 1977-09-20 | 6 | Details |
| US4044394A | Thin film magnetic head with a center tap | Expired / Lapsed | 1976-04-05 | 1977-08-23 | 7 | Details |
| US4037930A | Liquid crystal display cells | Expired / Lapsed | 1976-04-05 | 1977-07-26 | 6 | Details |
| US4029973A | Voltage booster circuit using level shifter composed of two… | Expired / Lapsed | 1976-04-06 | 1977-06-14 | 6 | Details |
| US4025613A | Timed-release aspirin | Expired / Lapsed | 1975-06-25 | 1977-05-24 | 8 | Details |
| US4024041A | Method of forming deposition films for use in multi-layer m… | Expired / Lapsed | 1975-12-16 | 1977-05-17 | 12 | Details |
| US4024352A | Cross-point switch matrix and multiswitching network using … | Expired / Lapsed | 1975-12-15 | 1977-05-17 | 13 | Details |
| US4021778A | Pattern recognition system | Expired / Lapsed | 1976-08-02 | 1977-05-03 | 12 | Details |
| US4016571A | Ink jet recording apparatus | Expired / Lapsed | 1975-09-12 | 1977-04-05 | 11 | Details |
| US4015239A | Character recognition apparatus | Expired / Lapsed | 1975-10-21 | 1977-03-29 | 6 | Details |
| US4014000A | Pattern recognition system utilizing a plurality of partial… | Expired / Lapsed | 1976-03-29 | 1977-03-22 | 10 | Details |
| US4011402A | Scanning circuit to deliver train of pulses shifted by a co… | Expired / Lapsed | 1974-08-19 | 1977-03-08 | 9 | Details |
| US4008412A | Thin-film field-emission electron source and a method for m… | Expired / Lapsed | 1975-08-18 | 1977-02-15 | 20 | Details |
| US4006790A | Electromagnetic guidance system | Expired / Lapsed | 1975-01-08 | 1977-02-08 | 15 | Details |
| US4002152A | Fuel injection control apparatus | Expired / Lapsed | 1975-07-14 | 1977-01-11 | 6 | Details |
| US3997378A | Method of manufacturing a semiconductor device utilizing mo… | Expired / Lapsed | 1975-10-17 | 1976-12-14 | 7 | Details |
| US3996792A | Supersonic wave flaw detecting apparatus | Expired / Lapsed | 1975-07-01 | 1976-12-14 | 14 | Details |
| US3990092A | Resistance element for semiconductor integrated circuit | Expired / Lapsed | 1975-01-13 | 1976-11-02 | 13 | Details |
| US3984844A | Thermal recording apparatus | Expired / Lapsed | 1975-11-18 | 1976-10-05 | 5 | Details |
| US3980899A | Word line driver circuit in memory circuit | Expired / Lapsed | 1975-02-06 | 1976-09-14 | 10 | Details |
| US3973828A | Optical wave guide | Expired / Lapsed | 1974-06-04 | 1976-08-10 | 6 | Details |
| US3973239A | Pattern preliminary processing system | Expired / Lapsed | 1974-10-15 | 1976-08-03 | 10 | Details |
| US3968019A | Method of manufacturing low power loss semiconductor device | Expired / Lapsed | 1975-03-21 | 1976-07-06 | 22 | Details |
| US3962687A | Method of inspection of semiconductor memory device | Expired / Lapsed | 1974-10-15 | 1976-06-08 | 3 | Details |
| US3949382A | Misfet circuit for reading the state of charge | Expired / Lapsed | 1974-10-16 | 1976-04-06 | 6 | Details |
| US3944975A | Signal checking system | Expired / Lapsed | 1975-05-27 | 1976-03-16 | 7 | Details |
| US3943359A | Apparatus for relatively positioning a plurality of objects… | Expired / Lapsed | 1974-06-17 | 1976-03-09 | 11 | Details |
| US3930155A | Ion microprobe analyser | Expired / Lapsed | 1974-01-17 | 1975-12-30 | 10 | Details |
| US3928718A | Image reproducing system | Expired / Lapsed | 1974-05-07 | 1975-12-23 | 16 | Details |
| US3926682A | Method for producing solid material having amorphous state … | Expired / Lapsed | 1974-10-15 | 1975-12-16 | 11 | Details |
| US3916034A | Method of transporting substances in a plasma stream to and… | Expired / Lapsed | 1972-05-19 | 1975-10-28 | 64 | Details |
| US3909480A | Epoxy resin compositions containing tetraphenylborates of i… | Expired / Lapsed | 1974-03-27 | 1975-09-30 | 21 | Details |
| US3909636A | Semiconductor large scale integrated circuit chip having cu… | Expired / Lapsed | 1974-03-26 | 1975-09-30 | 14 | Details |
| US3908616A | Ignition device for use in internal combustion engine | Expired / Lapsed | 1973-12-11 | 1975-09-30 | 19 | Details |
| US3909082A | Magnetic bearing devices | Expired / Lapsed | 1973-08-30 | 1975-09-30 | 22 | Details |
| US3906620A | Method of producing multi-layer structure | Expired / Lapsed | 1973-10-29 | 1975-09-23 | 10 | Details |
| US3906086A | Timed-release aspirin | Expired / Lapsed | 1974-01-22 | 1975-09-16 | 9 | Details |
| US3905039A | System for band conversion of color picture signal | Expired / Lapsed | 1973-09-12 | 1975-09-09 | 18 | Details |
| US3902812A | Photometer using three kinds of light wavelengths | Expired / Lapsed | 1974-05-20 | 1975-09-02 | 8 | Details |
| US3898501A | Light source lamp for atomic light absorption analysis | Expired / Lapsed | 1974-05-09 | 1975-08-05 | 11 | Details |
| US3895372A | Quick response liquid crystal display device | Expired / Lapsed | 1974-01-23 | 1975-07-15 | 13 | Details |
| US3893155A | Complementary MIS integrated circuit device on insulating s… | Expired / Lapsed | 1974-06-17 | 1975-07-01 | 29 | Details |
| US3892919A | Speech synthesis system | Expired / Lapsed | 1973-11-12 | 1975-07-01 | 5 | Details |
| US3891995A | Magnetic head | Expired / Lapsed | 1973-09-04 | 1975-06-24 | 12 | Details |
| US3889234A | Feature extractor of character and figure | Expired / Lapsed | 1973-10-04 | 1975-06-10 | 10 | Details |
| US3887762A | Inspection equipment for detecting and extracting small por… | Expired / Lapsed | 1972-11-20 | 1975-06-03 | 21 | Details |
| US3886579A | Avalanche photodiode | Expired / Lapsed | 1973-07-24 | 1975-05-27 | 11 | Details |
| US3881568A | Unattended travelling vehicle system | Expired / Lapsed | 1972-11-30 | 1975-05-06 | 10 | Details |
| US3877017A | Method of driving liquid crystal display device for numeric… | Expired / Lapsed | 1974-02-11 | 1975-04-08 | 6 | Details |
| US3877025A | Analog to digital converter of the parallel comparison | Expired / Lapsed | 1973-09-28 | 1975-04-08 | 7 | Details |
| US3875361A | Microwave heating apparatus having automatic heating period… | Expired / Lapsed | 1973-06-13 | 1975-04-01 | 13 | Details |
| US3869319A | Wear resistant deposited steel | Expired / Lapsed | 1973-01-18 | 1975-03-04 | 10 | Details |
| US3863218A | Pattern feature detection system | Expired / Lapsed | 1973-01-26 | 1975-01-28 | 14 | Details |
| US3863220A | Loop type data highway system for data transmission | Expired / Lapsed | 1972-12-07 | 1975-01-28 | 19 | Details |
| US3861798A | Mask for aligning patterns | Expired / Lapsed | 1973-05-21 | 1975-01-21 | 11 | Details |
| US3862357A | Hologram recording and reconstructing system | Expired / Lapsed | 1973-05-18 | 1975-01-21 | 23 | Details |
| US3861206A | Method and device for measuring a stress employing magnetos… | Expired / Lapsed | 1973-04-02 | 1975-01-21 | 6 | Details |
| US3849762A | Digital information processing apparatus for pattern recogn… | Expired / Lapsed | 1973-03-07 | 1974-11-19 | 7 | Details |
| US3848586A | Signal detection system | Expired / Lapsed | 1972-12-18 | 1974-11-19 | 12 | Details |
| US3846754A | Pattern pre-processing apparatus | Expired / Lapsed | 1973-04-04 | 1974-11-05 | 8 | Details |
| US3846166A | Method of producing multilayer wiring structure of integrat… | Expired / Lapsed | 1972-09-25 | 1974-11-05 | 2 | Details |
| US3844484A | Method of fuel atomization and a fuel atomizer nozzle there… | Expired / Lapsed | 1973-11-21 | 1974-10-29 | 11 | Details |
| US3838904A | Hologram producing apparatus with random object beam sampli… | Expired / Lapsed | 1973-03-13 | 1974-10-01 | 16 | Details |
| US3835322A | Method and apparatus for analyzing nitrogen oxides in gas | Expired / Lapsed | 1973-02-02 | 1974-09-10 | 28 | Details |
| US3832033A | Regular ferroelectrics-liquid crystal composite optical ele… | Expired / Lapsed | 1972-12-18 | 1974-08-27 | 16 | Details |
| US3820487A | Light source lamp cathode for atomic light absorption analy… | Expired / Lapsed | 1973-05-09 | 1974-06-28 | 2 | Details |
| US3811016A | Low frequency cut-off compensation system for baseband puls… | Expired / Lapsed | 1972-11-01 | 1974-05-14 | 7 | Details |
| US3801880A | Multilayer interconnected structure for semiconductor integ… | Expired / Lapsed | 1972-09-11 | 1974-04-02 | 23 | Details |
| US3796992A | Priority level discriminating apparatus | Expired / Lapsed | 1972-12-27 | 1974-03-12 | 19 | Details |
| US3795290A | Drum, rim grip braking device | Expired / Lapsed | 1971-12-02 | 1974-03-05 | 10 | Details |
| US3792355A | Orthogonal transformation circuit using hadamard matrices | Expired / Lapsed | 1971-12-10 | 1974-02-12 | 18 | Details |
| US3790086A | Atomizing nozzle | Expired / Lapsed | 1972-05-24 | 1974-02-05 | 18 | Details |
| US3782804A | Holography using multiple diffused object illumination beams | Expired / Lapsed | 1972-10-18 | 1974-01-01 | 7 | Details |
| US3771155A | Color display system | Expired / Lapsed | 1971-09-09 | 1973-11-06 | 14 | Details |
| US3739254A | Voltage multiplying rectifier device | Expired / Lapsed | 1971-12-21 | 1973-06-12 | 18 | Details |
| US3736192A | Integrated circuit and method of making the same | Expired / Lapsed | 1969-12-03 | 1973-05-29 | 0 | Details |
| US3735365A | Data exchange system | Expired / Lapsed | 1971-09-27 | 1973-05-22 | 16 | Details |
| US3734473A | Air valve type carburetor | Expired / Lapsed | 1971-01-05 | 1973-05-22 | 21 | Details |
| US3733527A | Semiconductor device and method for making the same | Expired / Lapsed | 1971-07-22 | 1973-05-15 | 6 | Details |
| US3727591A | Fuel supply control system for internal combustion engines | Expired / Lapsed | 1970-10-20 | 1973-04-17 | 6 | Details |
| US3714574A | Mobile communication system | Expired / Lapsed | 1969-04-25 | 1973-01-30 | 18 | Details |
| US3707703A | Microprogram-controlled data processing system capable of c… | Expired / Lapsed | 1970-11-17 | 1972-12-26 | 13 | Details |
| US3703710A | Semiconductor memory | Expired / Lapsed | 1971-01-04 | 1972-11-21 | 15 | Details |
| US3694092A | Photometer | Expired / Lapsed | 1970-03-03 | 1972-09-26 | 12 | Details |
| US3681171A | Apparatus for producing a multilayer printed circuit plate … | Expired / Lapsed | 1969-08-07 | 1972-08-01 | 0 | Details |
| US3672984A | Method of forming the electrode of a semiconductor device | Expired / Lapsed | 1970-02-25 | 1972-06-27 | 0 | Details |
| US3660178A | Method of diffusing an impurity into a compound semiconduct… | Expired / Lapsed | 1970-08-14 | 1972-05-02 | 7 | Details |
| US3658055A | Automatic arrhythmia diagnosing system | Expired / Lapsed | 1969-04-11 | 1972-04-25 | 14 | Details |
| US3654543A | Pulse transformer for firing thyristors | Expired / Lapsed | 1970-11-02 | 1972-04-04 | 17 | Details |
| US3636931A | Fuel injection controlling system for internal combustion e… | Expired / Lapsed | 1969-04-11 | 1972-01-25 | 13 | Details |
| US3636360A | Apparatus for detection of liquid level in transparent tube… | Expired / Lapsed | 1969-05-12 | 1972-01-18 | 9 | Details |
| US3634872A | Light-emitting diode with built-in drift field | Expired / Lapsed | 1970-09-04 | 1972-01-11 | 21 | Details |
| US3634689A | Automatic position or condition control devices using relat… | Expired / Lapsed | 1969-04-22 | 1972-01-11 | 15 | Details |
| US3634849A | Signal collecting and distributing systems | Expired / Lapsed | 1967-02-15 | 1972-01-11 | 28 | Details |
| US3631457A | Display apparatus | Expired / Lapsed | 1969-09-08 | 1971-12-28 | 6 | Details |
| US3618041A | Memory control system | Expired / Lapsed | 1969-10-29 | 1971-11-02 | 15 | Details |
| US3618042A | Error detection and instruction reexecution device in a dat… | Expired / Lapsed | 1969-10-29 | 1971-11-02 | 11 | Details |
| US3618040A | Memory control apparatus in multiprocessor system | Expired / Lapsed | 1969-09-17 | 1971-11-02 | 11 | Details |
| US3614747A | Instruction buffer system | Expired / Lapsed | 1969-10-29 | 1971-10-19 | 14 | Details |
| US3614564A | Readhesion apparatus for vehicles | Expired / Lapsed | 1968-07-22 | 1971-10-19 | 9 | Details |
| US3612017A | System for automatically controlling vehicle speed | Expired / Lapsed | 1969-03-25 | 1971-10-12 | 13 | Details |
| US3611315A | Memory control system for controlling a buffer memory | Expired / Lapsed | 1969-10-08 | 1971-10-05 | 10 | Details |
| US3607449A | Method of forming a junction by ion implantation | Expired / Lapsed | 1969-09-23 | 1971-09-21 | 9 | Details |
| US3606882A | Eog processing system for p-and qrswave characteristics | Expired / Lapsed | 1969-04-11 | 1971-09-21 | 0 | Details |
| US3599000A | Semiconductor optoelectronic logic element utilizing the gu… | Expired / Lapsed | 1969-03-13 | 1971-08-10 | 8 | Details |
| US3588525A | Chattering preventing circuit | Expired / Lapsed | 1967-12-12 | 1971-06-28 | 0 | Details |
| US3586636A | Europium activated vanadate phosphors with tantalum and/or … | Expired / Lapsed | 1968-11-25 | 1971-06-22 | 0 | Details |
| US3581291A | Memory control system in multiprocessing system | Expired / Lapsed | 1969-10-29 | 1971-05-25 | 15 | Details |
| US3581192A | Frequency spectrum analyzer with displayable colored shifta… | Expired / Lapsed | 1968-11-13 | 1971-05-25 | 12 | Details |
| US3581097A | Solid-state image pickup device | Expired / Lapsed | 1967-03-13 | 1971-05-25 | 10 | Details |
| US3568151A | Photoelectrical conversion system for pattern-recognizing a… | Expired / Lapsed | 1967-03-23 | 1971-03-02 | 10 | Details |
| US3564307A | Rotary electric ac generator utilizing the magnetic shieldi… | Expired / Lapsed | 1969-07-22 | 1971-02-16 | 10 | Details |
| US3564281A | High speed logic circuits and method of constructing the sa… | Expired / Lapsed | 1967-12-12 | 1971-02-16 | 14 | Details |
| US3560970A | Obstacle detector utilizing waveguide | Expired / Lapsed | 1968-09-13 | 1971-02-02 | 0 | Details |
| US3560957A | Signal conversion systems with storage and correction of qu… | Expired / Lapsed | 1967-01-23 | 1971-02-02 | 0 | Details |
| US3556225A | Automatic level control system for earth moving machines | Expired / Lapsed | 1968-07-30 | 1971-01-19 | 2 | Details |
| US3555253A | Numerical control system | Expired / Lapsed | 1967-02-20 | 1971-01-12 | 8 | Details |
| US3534388A | Plasma jet cutting process | Expired / Lapsed | 1969-03-10 | 1970-10-13 | 0 | Details |
| US3513834A | Anesthetic depth measuring system | Expired / Lapsed | 1967-11-21 | 1970-05-26 | 0 | Details |
| US3506837A | Pattern-detecting device using series connected photosensit… | Expired / Lapsed | 1966-12-13 | 1970-04-14 | 0 | Details |
| US3504430A | Method of making semiconductor devices having insulating fi… | Expired / Lapsed | 1967-06-13 | 1970-04-07 | 0 | Details |
| US3484313A | Method of manufacturing semiconductor devices | Expired / Lapsed | 1966-03-23 | 1969-12-16 | 0 | Details |
| US3473385A | Thermometer for measuring very low temperatures | Expired / Lapsed | 1967-05-09 | 1969-10-21 | 0 | Details |
| US3453434A | Infrared ray detector utilizing ferroelectric single crystal | Expired / Lapsed | 1968-10-22 | 1969-07-01 | 0 | Details |
| US3448389A | Differential frequency rate system for providing a pulse tr… | Expired / Lapsed | 1966-10-04 | 1969-06-03 | 2 | Details |
| US3408604A | Superconducting alloys and apparatus for generating superco… | Expired / Lapsed | 1967-03-06 | 1968-10-29 | 0 | Details |
| US3405259A | Speed ordering devices utilizing comparator and integrator … | Expired / Lapsed | 1964-11-27 | 1968-10-08 | 0 | Details |
| US3405335A | Zero-drift compensation device for self-balancing motor dri… | Expired / Lapsed | 1964-07-01 | 1968-10-08 | 0 | Details |
| US3377597A | Recorder for analyzing particle size distributions of powde… | Expired / Lapsed | 1965-12-08 | 1968-04-09 | 0 | Details |
| US3374477A | Shaft position digitizer | Expired / Lapsed | 1964-07-07 | 1968-03-19 | 0 | Details |
| US3372338A | Radio communication receiver with standby control and warni… | Expired / Lapsed | 1964-05-26 | 1968-03-05 | 2 | Details |
| US3355646A | Optimum driving method for step motors | Expired / Lapsed | 1965-04-07 | 1967-11-28 | 2 | Details |
| US3345222A | Method of forming a semiconductor device by etching and epi… | Expired / Lapsed | 1964-09-23 | 1967-10-03 | 2 | Details |
| US3343420A | Differential pressure transmitters | Expired / Lapsed | 1964-11-23 | 1967-09-26 | 2 | Details |
| US3328761A | Character reading system by detection between electron scan… | Expired / Lapsed | 1964-05-20 | 1967-06-27 | 2 | Details |
| US3327191A | Two-phase reversible step motor | Expired / Lapsed | 1963-07-29 | 1967-06-20 | 2 | Details |
| US3313427A | Control system with vehicle detecting means for parking bui… | Expired / Lapsed | 1963-11-27 | 1967-04-11 | 2 | Details |
| US3311756A | Electronic circuit having a fieldeffect transistor therein | Expired / Lapsed | 1964-06-19 | 1967-03-28 | 2 | Details |
| US3304793A | Transmission with bi-directional clutching mechanism | Expired / Lapsed | 1964-06-16 | 1967-02-21 | 2 | Details |
| US3303701A | Non-contact temperature measurement system | Expired / Lapsed | 1963-03-25 | 1967-02-14 | 2 | Details |
| US3299407A | Electronic digital computer provided with a drum type memor… | Expired / Lapsed | 1963-08-06 | 1967-01-17 | 2 | Details |
| US3297869A | Specimen heating device for an electron microscope specimen… | Expired / Lapsed | 1964-02-05 | 1967-01-10 | 0 | Details |
| US3286153A | Converter system for eliminating common mode induction volt… | Expired / Lapsed | 1963-10-09 | 1966-11-15 | 2 | Details |
| US3284750A | Low-temperature, negative-resistance element | Expired / Lapsed | 1964-03-25 | 1966-11-08 | 2 | Details |
| US3279305A | Optical turbidimeter | Expired / Lapsed | 1962-03-21 | 1966-10-18 | 2 | Details |
| US3274553A | Time-division, multiplex, numericalcontrol system | Expired / Lapsed | 1963-01-17 | 1966-09-20 | 0 | Details |
| US3260958A | Frequency sweep circuit for phase controlled oscillator | Expired / Lapsed | 1963-06-25 | 1966-07-12 | 2 | Details |
| US3241603A | Automatic temperature control system | Expired / Lapsed | 1964-03-10 | 1966-03-22 | 0 | Details |
| US3242014A | Method of producing semiconductor devices | Expired / Lapsed | 1963-09-24 | 1966-03-22 | 0 | Details |
| US3242405A | Brushless electric motor | Expired / Lapsed | 1963-04-23 | 1966-03-22 | 2 | Details |
| US3205504A | Multi-point marking assembly of a recorder | Expired / Lapsed | 1963-06-10 | 1965-09-07 | 2 | Details |
| US3174341A | High-speed rotating apparatus | Expired / Lapsed | 1962-11-20 | 1965-03-23 | 2 | Details |
| US3140613A | Differential pressure transmitters | Expired / Lapsed | 1961-06-19 | 1964-07-14 | 2 | Details |
| US3121998A | Constant-temperature apparatus with thermoelectric device | Expired / Lapsed | 1962-05-01 | 1964-02-25 | 2 | Details |