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Raytheon Co

Raytheon C
Active Patents
1
Total Holdings
883

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Patent No. Title Status Filing Date Grant Date Claims Actions
CA2131674A1 High performance error control coding in channel encoders a… Expired / Lapsed 1994-09-08 — 29 Details
WO1982002604A1 Miniature window for optical fiber Expired / Lapsed 1982-01-15 — 0 Details
DE2729008A1 OPTICAL WAVE CONDUCTOR ARRANGEMENT Expired / Lapsed 1977-06-28 — 0 Details
GB1443885A Radar system with brightness and resolution Expired / Lapsed 1974-10-21 — 0 Details
GB1462913A Dual spectrum infrared fire detection system with high ener… Expired / Lapsed 1974-06-12 — 0 Details
GB1388233A Digital scan converter Expired / Lapsed 1973-05-21 — 0 Details
DE2032211A1 Vehicle monitoring system Expired / Lapsed 1970-06-30 — 0 Details
GB966455A Devices for producing coherent electromagnetic radiation Expired / Lapsed 1963-03-13 — 0 Details
GB762734A Improvements in or relating to apparatus for introducing in… Expired / Lapsed 1954-11-10 — 0 Details
US10000000B2 Coherent LADAR using intra-pixel quadrature detection Active / In Force 2015-03-10 2018-06-19 23 Details
US6137440A Microwave active solid state cold/warm noise source Expired / Lapsed 1997-11-04 2000-10-24 25 Details
US5673697A High-resolution three, dimensional ultrasound imaging device Expired / Lapsed 1996-04-24 1997-10-07 12 Details
US5545897A Optically-based chemical detection system Expired / Lapsed 1994-10-04 1996-08-13 53 Details
US5502785A Integrated optical transceiver chip Expired / Lapsed 1994-02-28 1996-03-26 19 Details
US5394262A Volume display optical system and method Expired / Lapsed 1993-06-18 1995-02-28 34 Details
US5327149A R.F. transparent RF/UV-IR detector apparatus Expired / Lapsed 1992-05-18 1994-07-05 36 Details
US5317689A Digital visual and sensor simulation system for generating … Expired / Lapsed 1990-08-10 1994-05-31 26 Details
US5208766A Automated evaluation of painted surface quality Expired / Lapsed 1990-11-13 1993-05-04 28 Details
US5206654A Passive aircraft monitoring system Expired / Lapsed 1992-05-19 1993-04-27 26 Details
US5132597A Hollow cathode plasma switch with magnetic field Expired / Lapsed 1991-03-26 1992-07-21 28 Details
US5130786A Color image compression processing with compensation Expired / Lapsed 1989-09-12 1992-07-14 54 Details
US5093563A Electronically phased detector arrays for optical imaging Expired / Lapsed 1989-03-03 1992-03-03 83 Details
US5068086A Method and apparatus for batch fixating tissue specimens Expired / Lapsed 1990-06-12 1991-11-26 17 Details
US5027122A Method and apparatus for doppler velocity de-aliasing Expired / Lapsed 1990-03-12 1991-06-25 45 Details
US5002818A Reworkable epoxy die-attach adhesive Expired / Lapsed 1989-09-05 1991-03-26 25 Details
US4934779A System and method for low noise optical retroreflection wit… Expired / Lapsed 1989-04-24 1990-06-19 13 Details
US4906092A Range doppler self-referencing imaging system Expired / Lapsed 1988-09-19 1990-03-06 27 Details
US4891239A Method and apparatus for ultrafast microwave tissue fixation Expired / Lapsed 1989-04-13 1990-01-02 43 Details
US4847111A Plasma-nitridated self-aligned tungsten system for VLSI int… Expired / Lapsed 1988-06-30 1989-07-11 15 Details
US4846571A AM-FM laser Expired / Lapsed 1986-11-03 1989-07-11 11 Details
US4843313A Integrated circuit package carrier and test device Expired / Lapsed 1984-12-26 1989-06-27 8 Details
US4839658A Process for en route aircraft conflict alert determination … Expired / Lapsed 1986-07-28 1989-06-13 27 Details
US4814785A Wideband gridded square frequency selective surface Expired / Lapsed 1988-01-25 1989-03-21 2 Details
US4783744A Self-adaptive IRU correction loop design interfacing with t… Expired / Lapsed 1986-12-08 1988-11-08 13 Details
US4780684A Microwave integrated distributed amplifier with field emiss… Expired / Lapsed 1987-10-22 1988-10-25 53 Details
US4743919A Microwave frequency selective surface having fibrous cerami… Expired / Lapsed 1986-10-07 1988-05-10 19 Details
US4743112A Imaging spectrometer Expired / Lapsed 1986-07-18 1988-05-10 9 Details
US4740792A Vehicle location system Expired / Lapsed 1986-08-27 1988-04-26 39 Details
US4739496A Associative holographic memory apparatus employing phase co… Expired / Lapsed 1985-10-11 1988-04-19 18 Details
US4739401A Target acquisition system and method Expired / Lapsed 1985-01-25 1988-04-19 30 Details
US4721385A FM-CW laser radar system Expired / Lapsed 1986-12-09 1988-01-26 24 Details
US4712010A Radiator scanning with image enhancement and noise reduction Expired / Lapsed 1986-01-30 1987-12-08 26 Details
US4710772A Log magnitude pulse interference detection for a radar syst… Expired / Lapsed 1985-12-05 1987-12-01 33 Details
US4700307A Feature navigation system and method Expired / Lapsed 1983-07-11 1987-10-13 30 Details
US4698638A Dual mode target seeking system Expired / Lapsed 1985-12-26 1987-10-06 19 Details
US4680044A Method of modifying the refractive index of fluoride glass Expired / Lapsed 1985-11-25 1987-07-14 11 Details
US4669054A Device and method for optically correlating a pair of images Expired / Lapsed 1985-05-03 1987-05-26 14 Details
US4666295A Linear FM chirp laser Expired / Lapsed 1984-07-03 1987-05-19 32 Details
US4658332A Compliant layer printed circuit board Expired / Lapsed 1985-09-19 1987-04-14 39 Details
US4647147A Fiber optic to integrated optical chip coupler Expired / Lapsed 1984-01-20 1987-03-03 16 Details
US4643575A Fizeau interferometer Expired / Lapsed 1984-09-04 1987-02-17 19 Details
US4639290A Methods for selectively removing adhesives from polyimide s… Expired / Lapsed 1985-12-09 1987-01-27 17 Details
US4583589A Subsurface radiating dipole Expired / Lapsed 1984-04-24 1986-04-22 29 Details
US4580277A Digital-based phase shift keying modulator Expired / Lapsed 1984-03-12 1986-04-01 13 Details
US4577272A Fault tolerant and load sharing processing system Expired / Lapsed 1983-06-27 1986-03-18 22 Details
US4568603A Fiber-reinforced syntactic foam composites prepared from po… Expired / Lapsed 1984-05-11 1986-02-04 26 Details
US4543642A Data Exchange Subsystem for use in a modular array processor Expired / Lapsed 1982-01-26 1985-09-24 8 Details
US4538280A Coherent spread spectrum pseudonoise tracking loop Expired / Lapsed 1983-05-05 1985-08-27 39 Details
US4530564A Method and apparatus for production of holographic optical … Expired / Lapsed 1980-08-18 1985-07-23 16 Details
US4530103A Method and apparatus for baseband tracking of a PN code seq… Expired / Lapsed 1983-08-22 1985-07-16 23 Details
US4528674A Method and apparatus for baseband generation of a spread sp… Expired / Lapsed 1983-08-22 1985-07-09 20 Details
US4520445A Method of determining the position and velocity of a vehicle Expired / Lapsed 1984-02-07 1985-05-28 5 Details
US4490723A Parallel plate lens antenna Expired / Lapsed 1983-01-03 1984-12-25 8 Details
US4488154A Radar processor Expired / Lapsed 1982-03-25 1984-12-11 22 Details
US4484335A Method and apparatus for despreading a spread spectrum sign… Expired / Lapsed 1982-10-14 1984-11-20 12 Details
US4479131A Thermal protective shield for antenna reflectors Expired / Lapsed 1982-07-19 1984-10-23 7 Details
US4470145A Single sideband quadricorrelator Expired / Lapsed 1982-07-26 1984-09-04 6 Details
US4469944A Optical discriminating fire sensor Expired / Lapsed 1981-11-20 1984-09-04 50 Details
US4451905A Electrically erasable programmable read-only memory cell ha… Expired / Lapsed 1981-12-28 1984-05-29 24 Details
US4450334A Microwave pizza maker Expired / Lapsed 1981-04-24 1984-05-22 8 Details
US4421968A Microwave oven having rotating conductive radiators Expired / Lapsed 1981-01-05 1983-12-20 4 Details
US4414643A Ordering system for pairing feature intersections on a simu… Expired / Lapsed 1981-05-15 1983-11-08 10 Details
US4402040A Distributed bus arbitration method and apparatus Expired / Lapsed 1980-09-24 1983-08-30 31 Details
US4400812A Laser drive circuits Expired / Lapsed 1981-06-15 1983-08-23 14 Details
US4400790A Transversal correlator Expired / Lapsed 1981-01-06 1983-08-23 26 Details
US4392232A Simplified transversal correlator for MSK and MSK related w… Expired / Lapsed 1981-09-28 1983-07-05 18 Details
US4387374A Range mark position control employing optical encoding Expired / Lapsed 1980-08-04 1983-06-07 17 Details
US4384338A Methods and apparatus for blending computer image generated… Expired / Lapsed 1980-12-24 1983-05-17 10 Details
US4375312A Graded index waveguide structure and process for forming sa… Expired / Lapsed 1980-08-07 1983-03-01 16 Details
US4375087A Electrically erasable programmable read only memory Expired / Lapsed 1980-04-09 1983-02-22 29 Details
US4371587A Low temperature process for depositing oxide layers by phot… Expired / Lapsed 1981-03-26 1983-02-01 49 Details
US4362164A Electronic pick-up device for transducing electrical energy… Expired / Lapsed 1980-09-11 1982-12-07 4 Details
US4339751A Marine radar including anticollision unit Expired / Lapsed 1980-08-27 1982-07-13 7 Details
US4322726A Apparatus for providing a simulated view to hand held binoc… Expired / Lapsed 1979-12-19 1982-03-30 15 Details
US4317017A Microwave steamer Expired / Lapsed 1981-03-03 1982-02-23 27 Details
US4311384A Laser scanning system Expired / Lapsed 1975-08-04 1982-01-19 29 Details
US4305401A Digital watch/infrared plethysmograph having a quick releas… Expired / Lapsed 1979-05-16 1981-12-15 12 Details
US4288916A Method of making mass terminable shielded flat flexible cab… Expired / Lapsed 1979-12-26 1981-09-15 13 Details
US4290127A Beamformer with reduced sampling rate Expired / Lapsed 1979-12-03 1981-09-15 7 Details
US4283767A Multiple correlator reference processor Expired / Lapsed 1979-05-03 1981-08-11 9 Details
US4280506A Digital watch/infrared plethysmograph having a removable pu… Expired / Lapsed 1979-05-16 1981-07-28 18 Details
US4276779A Dynamically focussed array Expired / Lapsed 1979-03-29 1981-07-07 10 Details
US4271412A Range tracker utilizing spectral analysis Expired / Lapsed 1979-10-15 1981-06-02 12 Details
US4242962A Antitank weapon system and elements therefor Expired / Lapsed 1979-01-02 1981-01-06 3 Details
US4239347A Semiconductor light valve having improved counterelectrode … Expired / Lapsed 1979-05-29 1980-12-16 11 Details
US4234888A Multi-level large scale complex integrated circuit having f… Expired / Lapsed 1973-07-26 1980-11-18 26 Details
US4233571A Laser having a nonlinear phase conjugating reflector Expired / Lapsed 1978-09-27 1980-11-11 14 Details
US4220967A Scene tracker using multiple independent correlators Expired / Lapsed 1976-09-27 1980-09-02 12 Details
US4218111A Holographic head-up displays Expired / Lapsed 1978-07-10 1980-08-19 2 Details
US4208810A Clipping polygon faces through a polyhedron of vision Expired / Lapsed 1978-09-11 1980-06-24 19 Details
US4205313A Marine radar including anticollision unit Expired / Lapsed 1978-04-25 1980-05-27 21 Details
US4199875A Visibility effects generator Expired / Lapsed 1977-10-26 1980-04-29 17 Details
US4198762A Digital radar landmass simulator system Expired / Lapsed 1978-09-05 1980-04-22 15 Details
US4189747A Infrared tracking system Expired / Lapsed 1967-09-15 1980-02-19 21 Details
US4181405A Head-up viewing display Expired / Lapsed 1978-08-07 1980-01-01 18 Details
US4181953A Face vertex correction for real-time simulation of a polygo… Expired / Lapsed 1978-02-17 1980-01-01 10 Details
US4179824A Simulation of an object system formed by polygon faces havi… Expired / Lapsed 1978-05-04 1979-12-25 17 Details
US4177579A Simulation technique for generating a visual representation… Expired / Lapsed 1978-03-24 1979-12-11 17 Details
US4176351A Method of operating a continuous wave radar Expired / Lapsed 1978-08-18 1979-11-27 4 Details
US4174541A Bipolar monolithic integrated circuit memory with standby p… Expired / Lapsed 1978-05-25 1979-11-13 21 Details
US4171235A Process for fabricating heterojunction structures utilizing… Expired / Lapsed 1978-08-07 1979-10-16 12 Details
US4170997A Medical laser instrument for transmitting infrared laser en… Expired / Lapsed 1977-08-26 1979-10-16 11 Details
US4168489A Full page mode system for certain word processing devices Expired / Lapsed 1978-02-13 1979-09-18 7 Details
US4167737A Hybrid pulse compression system Expired / Lapsed 1978-01-09 1979-09-11 8 Details
US4167329A Focussed doppler radar Expired / Lapsed 1977-12-12 1979-09-11 17 Details
US4163231A Radar mapping technique Expired / Lapsed 1968-01-03 1979-07-31 26 Details
US4159873A Rangefinder and digital single shot circuit Expired / Lapsed 1977-09-27 1979-07-03 15 Details
US4159526A Digitally controlled variable frequency oscillator Expired / Lapsed 1977-08-08 1979-06-26 8 Details
US4158787A Electromechanical transducer-coupled mechanical structure w… Expired / Lapsed 1978-05-08 1979-06-19 8 Details
US4158838A In-raster symbol smoothing system Expired / Lapsed 1978-01-16 1979-06-19 16 Details
US4156875A Range gate generator with velocity aiding Expired / Lapsed 1978-03-13 1979-05-29 10 Details
US4152766A Variable resolution for real-time simulation of a polygon f… Expired / Lapsed 1978-02-08 1979-05-01 17 Details
US4151474A Variable bandwidth pass-band filter Expired / Lapsed 1977-08-18 1979-04-24 7 Details
US4149121A Four phase to two phase correlator Expired / Lapsed 1977-06-23 1979-04-10 17 Details
US4145931A Fresnel focussed imaging system Expired / Lapsed 1978-01-03 1979-03-27 4 Details
US4145644A Dual stepping angle stepper motor drive Expired / Lapsed 1977-06-30 1979-03-20 18 Details
US4144571A Vehicle guidance system Expired / Lapsed 1977-03-15 1979-03-13 18 Details
US4139936A Method of making hermetic coaxial cable Expired / Lapsed 1977-07-05 1979-02-20 4 Details
US4139868A Device for multiplexing video signals Expired / Lapsed 1977-04-21 1979-02-13 8 Details
US4133004A Video correlation tracker Expired / Lapsed 1977-11-02 1979-01-02 33 Details
US4129848A Platinum film resistor device Expired / Lapsed 1977-07-05 1978-12-12 7 Details
US4129850A Balanced transducer Expired / Lapsed 1975-02-03 1978-12-12 6 Details
US4125834A Display range marker processor Expired / Lapsed 1977-03-14 1978-11-14 14 Details
US4125898A Digitally shaped noise generating system Expired / Lapsed 1977-01-05 1978-11-14 7 Details
US4125310A Electrical connector assembly utilizing wafers for connecti… Expired / Lapsed 1975-12-01 1978-11-14 12 Details
US4122393A Spread spectrum detector Expired / Lapsed 1977-05-11 1978-10-24 19 Details
US4121049A Position and force measuring system Expired / Lapsed 1977-04-01 1978-10-17 31 Details
US4115914A Electrically erasable non-volatile semiconductor memory Expired / Lapsed 1977-02-22 1978-09-26 16 Details
US4107692A Radio frequency signal direction finding system Expired / Lapsed 1977-03-09 1978-08-15 6 Details
US4107685A Beam forming system Expired / Lapsed 1976-12-01 1978-08-15 14 Details
US4106019A Range resolving doppler radar system Expired / Lapsed 1972-10-05 1978-08-08 18 Details
US4102572A Dual-wavelength coherent optical adaptive systems Expired / Lapsed 1977-08-11 1978-07-25 19 Details
US4099028A Asynchronous multiplexer-demultiplexer Expired / Lapsed 1977-04-21 1978-07-04 12 Details
US4099200A Package for semiconductor beam lead devices Expired / Lapsed 1976-12-17 1978-07-04 6 Details
US4093357A Cermet interface for electro-optical devices Expired / Lapsed 1977-04-05 1978-06-06 6 Details
US4093857A Radiographic normalizing system Expired / Lapsed 1976-12-20 1978-06-06 7 Details
US4093949A Clutter tracker using a smoothed doppler frequency measurem… Expired / Lapsed 1976-05-26 1978-06-06 16 Details
US4090066A Polarization reference imaging system Expired / Lapsed 1976-04-22 1978-05-16 8 Details
US4082413A Selective radiation absorption devices for producing heat e… Expired / Lapsed 1976-01-02 1978-04-04 9 Details
US4077037A Variable range marker Expired / Lapsed 1976-08-06 1978-02-28 11 Details
US4077062A Real-time simulation of a point system with a CRT blank per… Expired / Lapsed 1975-12-19 1978-02-28 12 Details
US4063084A Dual channel optical homodyne receiver Expired / Lapsed 1976-07-19 1977-12-13 13 Details
US4060308A Angle selective coupler for optical fibers Expired / Lapsed 1975-08-04 1977-11-29 7 Details
US4054366A Fiber optics access coupler Expired / Lapsed 1976-07-12 1977-10-18 8 Details
US4054880A Position fixing system utilizing plural commercial broadcas… Expired / Lapsed 1976-01-19 1977-10-18 16 Details
US4050085A Automatic light control system Expired / Lapsed 1969-06-04 1977-09-20 24 Details
US4047117A Multi-level laser illuminator Expired / Lapsed 1976-12-27 1977-09-06 14 Details
US4044247A Polarization reference imaging technique Expired / Lapsed 1975-12-16 1977-08-23 31 Details
US4042935A Wideband multiplexing antenna feed employing cavity backed … Expired / Lapsed 1975-10-08 1977-08-16 15 Details
US4031364A Multiple moment video detector Expired / Lapsed 1975-11-10 1977-06-21 21 Details
US4030686A Position determining systems Expired / Lapsed 1975-09-04 1977-06-21 11 Details
US4028509A Simplified tabulator keyboard assembly for use in watch/cal… Expired / Lapsed 1975-08-29 1977-06-07 5 Details
US4024626A Method of making integrated transistor matrix for flat pane… Expired / Lapsed 1976-02-18 1977-05-24 5 Details
US4021716A Reactionless gimbal drive system Expired / Lapsed 1974-12-23 1977-05-03 12 Details
US4019159A Optical frequency doubler using electro-optic crystal with … Expired / Lapsed 1975-10-14 1977-04-19 10 Details
US4011445A Optical array active radar imaging technique Expired / Lapsed 1975-12-16 1977-03-08 27 Details
US4005935A Method and apparatus for providing a phase compensated opti… Expired / Lapsed 1975-07-31 1977-02-01 17 Details
US4005417A Frequency spectrum analyzer Expired / Lapsed 1975-08-14 1977-01-25 13 Details
US3996421A Television display utilizing local area brightness control Expired / Lapsed 1975-09-02 1976-12-07 12 Details
US3983320A Raster display histogram equalization Expired / Lapsed 1975-08-25 1976-09-28 13 Details
US3979686A Optical frequency modulation demodulator Expired / Lapsed 1975-09-08 1976-09-07 6 Details
US3975628A Optical heterodyne receiver with phase or frequency lock Expired / Lapsed 1975-04-02 1976-08-17 13 Details
US3970993A Cooperative-word linear array parallel processor Expired / Lapsed 1974-01-02 1976-07-20 22 Details
US3968787A Controlled vapor chamber cooking device Expired / Lapsed 1973-03-16 1976-07-13 6 Details
US3962704A Moving target indicator clutter tracker Expired / Lapsed 1974-05-31 1976-06-08 9 Details
US3952297A Constant writing rate digital stroke character generator ha… Expired / Lapsed 1974-08-01 1976-04-20 25 Details
US3952304A Tracking system utilizing Kalman filter concepts Expired / Lapsed 1973-11-23 1976-04-20 10 Details
US3950750A Radar system having quadrature phase detector compensator Expired / Lapsed 1974-10-03 1976-04-13 6 Details
US3950611A Gated video centroid tracker Expired / Lapsed 1966-11-22 1976-04-13 19 Details
US3949263A Diamond brazing method for slow wave energy propagating str… Expired / Lapsed 1974-12-20 1976-04-06 8 Details
US3947834A Doppler perimeter intrusion alarm system using a leaky wave… Expired / Lapsed 1974-04-30 1976-03-30 32 Details
US3941968A Microwave browning plate Expired / Lapsed 1975-03-27 1976-03-02 3 Details
US3942011A Gamma camera display system Expired / Lapsed 1974-12-23 1976-03-02 5 Details
US3941973A Laser material removal apparatus Expired / Lapsed 1974-06-26 1976-03-02 10 Details
US3940204A Optical display systems utilizing holographic lenses Expired / Lapsed 1975-01-23 1976-02-24 28 Details
US3924259A Array of multicellular transducers Expired / Lapsed 1974-05-15 1975-12-02 15 Details
US3924186A Staggered quadriphase differential encoder and decoder Expired / Lapsed 1974-02-07 1975-12-02 22 Details
US3921099A Frequency stabilized laser Expired / Lapsed 1974-09-16 1975-11-18 9 Details
US3921166A Capacitance matrix keyboard Expired / Lapsed 1972-09-15 1975-11-18 15 Details
US3915548A Holographic lens and liquid crystal image source for head-u… Expired / Lapsed 1974-11-29 1975-10-28 10 Details
US3909735A Slow switch for bandwidth change in phase-locked loop Expired / Lapsed 1974-04-04 1975-09-30 12 Details
US3909798A Virtual addressing method and apparatus Expired / Lapsed 1974-01-25 1975-09-30 4 Details
US3903488A Planar dielectric waveguide and associated components for i… Expired / Lapsed 1974-06-10 1975-09-02 11 Details
US3900878A Mine rescue system Expired / Lapsed 1973-02-14 1975-08-19 11 Details
US3896429A Segment decoder for numeric display Expired / Lapsed 1973-06-25 1975-07-22 11 Details
US3886302A Closed circuit television modem sharing system Expired / Lapsed 1974-01-28 1975-05-27 9 Details
US3885095A Combined head-up multisensor display Expired / Lapsed 1973-04-30 1975-05-20 12 Details
US3883870A System for phase aligning parallel signal processing channe… Expired / Lapsed 1973-12-17 1975-05-13 6 Details
US3877239A Free piston cryogenic refrigerator with phase angle control Expired / Lapsed 1974-03-18 1975-04-15 5 Details
US3878530A Radar video processing apparatus Expired / Lapsed 1965-03-15 1975-04-15 9 Details
US3873371A Small geometry charge coupled device and process for fabric… Expired / Lapsed 1972-11-07 1975-03-25 7 Details
US3872446A Visual display system Expired / Lapsed 1973-05-07 1975-03-18 11 Details
US3858304A Process for fabricating small geometry semiconductor devices Expired / Lapsed 1974-01-30 1975-01-07 3 Details
US3857993A Beam lead semiconductor package Expired / Lapsed 1973-11-21 1974-12-31 9 Details
US3858208A Automatic prf selection to optimize range and doppler visib… Expired / Lapsed 1973-02-05 1974-12-31 14 Details
US3857009A Microwave browning means Expired / Lapsed 1973-09-10 1974-12-24 16 Details
US3852890A Remote reading tilt encoder Expired / Lapsed 1972-03-02 1974-12-10 14 Details
US3851189A Bisitable digital circuitry Expired / Lapsed 1973-06-25 1974-11-26 8 Details
US3848038A Drying expanded plastic with microwave energy Expired / Lapsed 1973-06-04 1974-11-12 2 Details
US3845266A Microwave cooking utensil Expired / Lapsed 1973-07-09 1974-10-29 16 Details
US3845276A Laser-sight and computer for anti-aircraft gun fire control… Expired / Lapsed 1971-12-17 1974-10-29 26 Details
US3831052A Hollow cathode gas discharge device Expired / Lapsed 1973-05-25 1974-08-20 11 Details
US3831031A Zone plate imaging system Expired / Lapsed 1972-09-15 1974-08-20 21 Details
US3829192A Receive and display optical raster scan generator Expired / Lapsed 1973-05-21 1974-08-13 10 Details
US3829688A High intensity radiation imaging system Expired / Lapsed 1972-05-04 1974-08-13 25 Details
US3828204A Sensitive pulse threshold detector Expired / Lapsed 1973-04-16 1974-08-06 32 Details
US3825754A Dual spectrum infrared fire detection system with high ener… Expired / Lapsed 1973-07-23 1974-07-23 16 Details
US3824003A Liquid crystal display panel Expired / Lapsed 1973-05-07 1974-07-16 9 Details
US3821740A Super directive system Expired / Lapsed 1972-07-03 1974-06-28 2 Details
US3821646A Scatter communication system Expired / Lapsed 1972-02-25 1974-06-28 4 Details
US3818237A Means for providing redundancy of key system components Expired / Lapsed 1972-08-14 1974-06-18 2 Details
US3816804A Bilateral power conditioner for spacecraft Expired / Lapsed 1973-05-29 1974-06-11 13 Details
US3816729A Real time fourier transformation apparatus Expired / Lapsed 1971-11-24 1974-06-11 34 Details
US3810174A Digital scan converter Expired / Lapsed 1969-11-28 1974-05-07 38 Details
US3806814A Phantom subscriber Expired / Lapsed 1972-04-26 1974-04-23 22 Details
US3800247A Surface wave structure Expired / Lapsed 1971-06-23 1974-03-26 34 Details
US3794993A Coordinate generation system Expired / Lapsed 1972-06-22 1974-02-26 29 Details
US3793958A Optical fusing arrangement Expired / Lapsed 1972-06-22 1974-02-26 8 Details
US3794941A Automatic antenna impedance tuner including digital control… Expired / Lapsed 1972-05-08 1974-02-26 44 Details
US3792416A System, method and seal for pressure-sensitive wire and int… Expired / Lapsed 1972-04-03 1974-02-12 72 Details
US3790700A Catv program control system Expired / Lapsed 1971-12-17 1974-02-05 45 Details
US3787848A System for discriminating between high and low speed targets Expired / Lapsed 1972-08-28 1974-01-22 20 Details
US3786405A System for low-frequency transmission of radiant energy Expired / Lapsed 1972-11-08 1974-01-15 36 Details
US3786429A Electronic text display system which simulates a typewriter Expired / Lapsed 1971-07-12 1974-01-15 7 Details
US3783271A Radiation tracking system Expired / Lapsed 1971-09-27 1974-01-01 26 Details
US3765018A Digital scan converter Expired / Lapsed 1972-06-02 1973-10-09 10 Details
US3764213A Return-wave, phase controlled adaptive array Expired / Lapsed 1972-05-08 1973-10-09 22 Details
US3765020A Digitally controlled attenuator Expired / Lapsed 1972-04-14 1973-10-09 12 Details
US3761675A Material cutting and printing system Expired / Lapsed 1972-01-19 1973-09-25 21 Details
US3761936A Multi-beam array antenna Expired / Lapsed 1971-05-11 1973-09-25 4 Details
US3760360A Matrix switch Expired / Lapsed 1971-11-01 1973-09-18 11 Details
US3758753A Optical code reader system Expired / Lapsed 1971-07-16 1973-09-11 8 Details
US3751639A Card reader system Expired / Lapsed 1972-06-08 1973-08-07 6 Details
US3744261A Cryogenic refrigerator Expired / Lapsed 1972-03-16 1973-07-10 11 Details
US3745533A Digital data storage register modules Expired / Lapsed 1970-05-27 1973-07-10 5 Details
US3745532A Modular digital processing equipment Expired / Lapsed 1970-05-27 1973-07-10 19 Details
US3742201A Transformer system for orthogonal digital waveforms Expired / Lapsed 1971-02-22 1973-06-26 15 Details
US3740581A Precision switching circuit for analog signals Expired / Lapsed 1972-03-08 1973-06-19 6 Details
US3740663A Q-switched laser system Expired / Lapsed 1970-12-21 1973-06-19 10 Details
US3740747A Cross-correlator Expired / Lapsed 1964-02-27 1973-06-19 25 Details
US3736937A Cryogenic tool Expired / Lapsed 1972-06-08 1973-06-05 27 Details
US3736376A Automatic control system for video tracker Expired / Lapsed 1967-03-30 1973-05-29 15 Details
US3735409A Electromagnetic wave receiver Expired / Lapsed 1972-02-22 1973-05-22 19 Details
US3735237A Cycle converter power supply for microwave heating Expired / Lapsed 1971-09-01 1973-05-22 29 Details
US3733129A Laser distance detector Expired / Lapsed 1971-02-01 1973-05-15 17 Details
US3731103A Adaptive arrays Expired / Lapsed 1971-02-24 1973-05-01 9 Details
US3725915A High resolution mapping system Expired / Lapsed 1960-12-27 1973-04-03 32 Details
US3719942A Adaptive automatic gain control for radar systems Expired / Lapsed 1970-09-30 1973-03-06 15 Details
US3716825A Contour measuring apparatus especially for use in a sea bot… Expired / Lapsed 1970-07-30 1973-02-13 13 Details
US3716783A Sequential check-out system including code comparison for c… Expired / Lapsed 1969-10-30 1973-02-13 0 Details
US3714706A Array of conductors fixed through dielectric plate Expired / Lapsed 1970-08-21 1973-02-06 0 Details
US3714434A Despin control system for a multispin stabilized device Expired / Lapsed 1971-01-29 1973-01-30 14 Details
US3714650A Vehicle command and control system Expired / Lapsed 1970-07-30 1973-01-30 32 Details
US3705936A Moving target platform digital video mapper Expired / Lapsed 1970-05-18 1972-12-12 0 Details
US3703722A Motion detection system with split-ring monostatic doppler … Expired / Lapsed 1971-06-02 1972-11-21 20 Details
US3701162A Planar antenna array Expired / Lapsed 1964-03-24 1972-10-24 22 Details
US3698946A Transparent conductive coating and process therefor Expired / Lapsed 1969-11-21 1972-10-17 0 Details
US3694656A Balanced optical demodulator Expired / Lapsed 1970-10-28 1972-09-26 2 Details
US3671918A Intraconnector wiring change module Expired / Lapsed 1969-04-28 1972-06-20 19 Details
US3669540A Optical depth finder and elements therefor Expired / Lapsed 1970-08-31 1972-06-13 0 Details
US3666949A Shielded optical radiation detecting device Expired / Lapsed 1970-09-28 1972-05-30 13 Details
US3666367A Digital range measuring system Expired / Lapsed 1970-06-01 1972-05-30 0 Details
US3665282A Scan control system Expired / Lapsed 1969-07-24 1972-05-23 15 Details
US3663800A Optical label reader and decoder Expired / Lapsed 1971-01-21 1972-05-16 14 Details
US3660087A Nucleation in recording and development Expired / Lapsed 1969-07-07 1972-05-02 12 Details
US3659510A Apparatus and method utilizable in forming metal grids Expired / Lapsed 1969-05-01 1972-05-02 8 Details
US3654473A Phase modulation laser communication system Expired / Lapsed 1969-04-28 1972-04-04 5 Details
US3649394A 3-dimensional cone antenna method Expired / Lapsed 1969-04-03 1972-03-14 0 Details
US3646580A Surface vehicle fleet command and control system Expired / Lapsed 1969-07-18 1972-02-29 9 Details
US3644043A Integrated infrared-tracker-receiver laser-rangefinder targ… Expired / Lapsed 1969-08-11 1972-02-22 11 Details
US3643106A Analog shift register Expired / Lapsed 1970-09-14 1972-02-15 11 Details
US3641257A Noise suppressor for surveillance and intrusion-detecting s… Expired / Lapsed 1970-01-16 1972-02-08 12 Details
US3641266A Surveillance and intrusion detecting system Expired / Lapsed 1969-12-29 1972-02-08 19 Details
US3641261A Night vision system Expired / Lapsed 1969-06-04 1972-02-08 17 Details
US3639838A Synchronized variable delay time division communication sys… Expired / Lapsed 1968-01-30 1972-02-01 8 Details
US3634622A Remote view and direct view camera-pointing system Expired / Lapsed 1969-06-04 1972-01-11 16 Details
US3633169A Demand access digital-communications system Expired / Lapsed 1970-05-28 1972-01-04 38 Details
US3633173A Digital scan converter Expired / Lapsed 1970-03-16 1972-01-04 7 Details
US3631315A Broadband traveling wave device having a logarithmically va… Expired / Lapsed 1969-10-20 1971-12-28 20 Details
US3631503A High-performance distributionally integrated subarray anten… Expired / Lapsed 1969-05-02 1971-12-28 14 Details
US3623096A Deflection modulated target discriminator Expired / Lapsed 1967-02-15 1971-11-23 9 Details
US3615934A Insulated-gate field-effect device having source and drain … Expired / Lapsed 1967-10-30 1971-10-26 2 Details
US3605107A Lightweight reflecting structures utilizing magnetic deploy… Expired / Lapsed 1969-07-17 1971-09-14 7 Details
US3605029A Signal detection apparatus Expired / Lapsed 1969-06-30 1971-09-14 3 Details
US3599105A Amplitude discriminator with an adaptive threshold Expired / Lapsed 1969-07-24 1971-08-10 11 Details
US3594551A High speed digital counter Expired / Lapsed 1966-11-29 1971-07-20 9 Details
US3593032A Mosfet static shift register Expired / Lapsed 1969-12-15 1971-07-13 4 Details
US3588440A Laser combination energy system Expired / Lapsed 1969-06-26 1971-06-28 0 Details
US3585397A Programmed fine ion implantation beam system Expired / Lapsed 1968-10-04 1971-06-15 8 Details
US3584312A Spikeless single-mode laser Expired / Lapsed 1969-10-20 1971-06-08 8 Details
US3579201A Method of performing digital computations using multipurpos… Expired / Lapsed 1969-09-29 1971-05-18 8 Details
US3573833A Broadband dielectric lens antenna fed by multiconductor qua… Expired / Lapsed 1969-07-22 1971-04-06 13 Details
US3569757A Acceleration system for implanting ions in specimen Expired / Lapsed 1968-10-04 1971-03-09 0 Details
US3567506A Method for providing a planar transistor with heat-dissipat… Expired / Lapsed 1968-03-22 1971-03-02 0 Details
US3561839A High-speed hologram Expired / Lapsed 1969-10-06 1971-02-09 0 Details
US3562439A Telephone inband signalling system Expired / Lapsed 1968-06-24 1971-02-09 5 Details
US3562022A Method of doping semiconductor bodies by indirection implan… Expired / Lapsed 1967-12-26 1971-02-09 0 Details
US3560077A Variable transmission passive q-switch Expired / Lapsed 1968-02-19 1971-02-02 0 Details
US3551826A Frequency multiplier and frequency waveform generator Expired / Lapsed 1968-05-16 1970-12-29 0 Details
US3546695A Radar transpondor system Expired / Lapsed 1969-03-03 1970-12-08 0 Details
US3545861A Selective target ranging system Expired / Lapsed 1966-04-08 1970-12-08 0 Details
US3546375A Three-dimensional terrain mapping system Expired / Lapsed 1965-09-20 1970-12-08 0 Details
US3544399A Insulated gate field-effect transistor (igfet) with semicon… Expired / Lapsed 1966-10-26 1970-12-01 0 Details
US3535676A Electrical connector Expired / Lapsed 1968-02-12 1970-10-20 0 Details
US3535447A Inductively coupled telautograph apparatus with stylus angl… Expired / Lapsed 1967-11-06 1970-10-20 0 Details
US3533857A Method of restoring crystals damaged by irradiation Expired / Lapsed 1967-11-29 1970-10-13 0 Details
US3531773A Three stage switching matrix Expired / Lapsed 1968-02-26 1970-09-29 0 Details
US3531282A Photopolymer polymerization fixation process and products Expired / Lapsed 1966-10-03 1970-09-29 0 Details
US3529121A Welding apparatus Expired / Lapsed 1967-04-03 1970-09-15 0 Details
US3524180A Passive intrusion detecting system Expired / Lapsed 1967-01-27 1970-08-11 0 Details
US3523042A Method of making bipolar transistor devices Expired / Lapsed 1967-12-26 1970-08-04 0 Details
US3522604A Coherent-angle tracking system Expired / Lapsed 1955-12-09 1970-08-04 1 Details
US3520741A Method of simultaneous epitaxial growth and ion implantation Expired / Lapsed 1967-12-18 1970-07-14 0 Details
US3520607A Phase sensing laser contour mapper Expired / Lapsed 1967-10-17 1970-07-14 0 Details
US3513264A Controlled random multiple access communication system Expired / Lapsed 1966-05-13 1970-05-19 0 Details
US3504165A Navigation station identification Expired / Lapsed 1967-03-27 1970-03-31 0 Details
US3500022A Reversible electronic digital counter Expired / Lapsed 1966-06-24 1970-03-10 0 Details
US3497695A Radiant energy transmitting device Expired / Lapsed 1961-12-11 1970-02-24 2 Details
US3493820A Airgap isolated semiconductor device Expired / Lapsed 1966-12-01 1970-02-03 0 Details
US3490028A Power supply energy transformation apparatus Expired / Lapsed 1968-07-24 1970-01-13 0 Details
US3488483A Constant writing rate vector generator Expired / Lapsed 1967-06-30 1970-01-06 0 Details
US3486892A Preferential etching technique Expired / Lapsed 1969-01-17 1969-12-30 0 Details
US3485282A Expandable insert for solid and cellular structures Expired / Lapsed 1968-01-26 1969-12-23 0 Details
US3483443A Diode having large capacitance change related to minimal ap… Expired / Lapsed 1967-09-28 1969-12-09 0 Details
US3482099A Tuned stable laser in a communication system Expired / Lapsed 1965-08-16 1969-12-02 0 Details
US3474447A Electronically scanned tacan antenna Expired / Lapsed 1968-05-02 1969-10-21 0 Details
US3472712A Field-effect device with insulated gate Expired / Lapsed 1966-10-27 1969-10-14 0 Details
US3472574A Wave deflector arrangement Expired / Lapsed 1966-08-01 1969-10-14 0 Details
US3471922A Monolithic integrated circuitry with dielectric isolated fu… Expired / Lapsed 1966-06-02 1969-10-14 0 Details
US3471803A Laser having a stabilized output spectrum Expired / Lapsed 1967-04-28 1969-10-07 0 Details
US3469239A Interlocking means for a multi-processor system Expired / Lapsed 1965-12-02 1969-09-23 0 Details
US3463594A Laser tool apparatus Expired / Lapsed 1965-11-01 1969-08-26 0 Details
US3457552A Adaptive self-organizing pattern recognizing system Expired / Lapsed 1966-10-24 1969-07-22 0 Details
US3454772A Photoelectric monitoring system for holding the object plan… Expired / Lapsed 1966-12-20 1969-07-08 0 Details
US3453624A System for determining craft position Expired / Lapsed 1968-02-20 1969-07-01 0 Details
US3453382A Multiple interlace television system Expired / Lapsed 1964-01-20 1969-07-01 2 Details
US3451010A Laser systems employing a solid laser material Expired / Lapsed 1967-03-10 1969-06-17 0 Details
US3447238A Method of making a field effect transistor by diffusion,coa… Expired / Lapsed 1965-08-09 1969-06-03 0 Details
US3445787A Tunable,frequency stabilized laser Expired / Lapsed 1966-08-01 1969-05-20 2 Details
US3445838A Stroboscopic display device with buffer input and separate … Expired / Lapsed 1965-08-23 1969-05-20 0 Details
US3445663A Noise discrimination by unblanking during the time that an … Expired / Lapsed 1964-06-25 1969-05-20 0 Details
US3444381A Silicon photodiode having folded electrode to increase ligh… Expired / Lapsed 1967-05-22 1969-05-13 0 Details
US3441934A Doppler shift correction analog computer Expired / Lapsed 1967-07-12 1969-04-29 0 Details
US3431392A Internally heated crystal devices Expired / Lapsed 1967-01-13 1969-03-04 0 Details
US3423651A Microcircuit with complementary dielectrically isolated mes… Expired / Lapsed 1966-01-13 1969-01-21 0 Details
US3423526A Narrow-band television Expired / Lapsed 1965-01-21 1969-01-21 0 Details
US3417374A Computer-controlled data transferring buffer Expired / Lapsed 1966-01-24 1968-12-17 0 Details
US3416054A Motor control apparatus including sequential interval gener… Expired / Lapsed 1966-05-10 1968-12-10 2 Details
US3414718A Counting circuit Expired / Lapsed 1964-12-16 1968-12-03 0 Details
US3412397A Video correlator and automatic detector for pencil beam rad… Expired / Lapsed 1967-02-01 1968-11-19 0 Details
US3404399A Digital clutter rejection system Expired / Lapsed 1966-04-22 1968-10-01 0 Details
US3404384A Wire memory storage system Expired / Lapsed 1963-10-31 1968-10-01 0 Details
US3403307A Strain sensitive barrier junction semiconductor device Expired / Lapsed 1963-02-26 1968-09-24 0 Details
US3400387A Stroboscopic display device with rotatable drum having char… Expired / Lapsed 1964-12-04 1968-09-03 0 Details
US3397401A Voice operated communication system Expired / Lapsed 1966-05-27 1968-08-13 0 Details
US3394371A Vehicle motion nulling system Expired / Lapsed 1966-10-27 1968-07-23 0 Details
US3392622A Electromagnetic rotation sensor Expired / Lapsed 1964-06-09 1968-07-16 0 Details
US3391383A Electrical connector for integrated circuit elements Expired / Lapsed 1966-06-20 1968-07-02 2 Details
US3386091A Statistical zero target recognition system Expired / Lapsed 1965-01-29 1968-05-28 0 Details
US3383621A Laser crystal with prismatic end surface Expired / Lapsed 1962-05-18 1968-05-14 2 Details
US3381187A High-frequency field-effect triode device Expired / Lapsed 1964-08-18 1968-04-30 2 Details
US3377590A Radar ranging apparatus for a communication system Expired / Lapsed 1966-11-29 1968-04-09 0 Details
US3377516A Cordwood package with removable plugs Expired / Lapsed 1966-08-04 1968-04-09 0 Details
US3377471A System effectiveness simulator and computer Expired / Lapsed 1964-07-21 1968-04-09 2 Details
US3374465A Multiprocessor system having floating executive control Expired / Lapsed 1965-03-19 1968-03-19 0 Details
US3372228A Television signal recorder Expired / Lapsed 1965-05-21 1968-03-05 0 Details
US3370267A Beam forming system Expired / Lapsed 1965-10-23 1968-02-20 0 Details
US3369163A Straight line motor control for an x-y plotter Expired / Lapsed 1961-12-29 1968-02-13 2 Details
US3361591A Production of thin films of cadmium sulfide, cadmium tellur… Expired / Lapsed 1964-04-15 1968-01-02 0 Details
US3354714A Marine speedometer Expired / Lapsed 1964-12-01 1967-11-28 2 Details
US3353177A Radar clutter video processing system Expired / Lapsed 1966-04-04 1967-11-14 2 Details
US3353115A Ruby laser systems Expired / Lapsed 1965-11-29 1967-11-14 2 Details
US3349244A Ir background noise discriminator through selective time ga… Expired / Lapsed 1964-06-25 1967-10-24 2 Details
US3349174A Beam scanning device Expired / Lapsed 1964-02-03 1967-10-24 2 Details
US3344420A Data collection system Expired / Lapsed 1965-02-05 1967-09-26 2 Details
US3344322A Metal-oxide-semiconductor field effect transistor Expired / Lapsed 1965-01-22 1967-09-26 2 Details
US3343140A Banked memory system Expired / Lapsed 1964-10-27 1967-09-19 2 Details
US3339274A Top contact for surface protected semiconductor devices Expired / Lapsed 1964-03-16 1967-09-05 2 Details
US3336534A Multi-phase detector and keyed-error detector phase-locked-… Expired / Lapsed 1965-02-08 1967-08-15 2 Details
US3333267A Electronic data processing system Expired / Lapsed 1965-05-14 1967-07-25 2 Details
US3326718A Method for making an electrical capacitor Expired / Lapsed 1963-12-30 1967-06-20 2 Details
US3325730A Pulse time jitter measuring system Expired / Lapsed 1963-12-23 1967-06-13 2 Details
US3321747A Memory protection system Expired / Lapsed 1964-10-02 1967-05-23 2 Details
US3320424A Photosensitive optical angle tracker Expired / Lapsed 1963-11-21 1967-05-16 1 Details
US3319188A Phase modulator using a varactor passive t-network Expired / Lapsed 1964-05-26 1967-05-09 2 Details
US3309508A Hybrid multiplier Expired / Lapsed 1963-03-01 1967-03-14 2 Details
US3305781A Diversity combiners Expired / Lapsed 1966-09-09 1967-02-21 1 Details
US3305854A Sampled data system Expired / Lapsed 1963-12-19 1967-02-21 2 Details
US3305867A Antenna array system Expired / Lapsed 1963-11-05 1967-02-21 1 Details
US3305635A Multitone data transmission system with data bits comprised… Expired / Lapsed 1963-02-25 1967-02-21 2 Details
US3305751A Traveling wave device Expired / Lapsed 1962-10-26 1967-02-21 2 Details
US3303387A Electronic circuit breaker for interrupting load current wh… Expired / Lapsed 1963-07-19 1967-02-07 2 Details
US3293438A Signal mixing device for producing high frequency radiation Expired / Lapsed 1963-05-24 1966-12-20 2 Details
US3287188A Method for producing a boron diffused sillicon transistor Expired / Lapsed 1963-11-01 1966-11-22 0 Details
US3287692A Bender type electroacoustical apparatus Expired / Lapsed 1963-02-13 1966-11-22 2 Details
US3283320A Analog-to-digital translator Expired / Lapsed 1963-08-15 1966-11-01 2 Details
US3278843A Thickness rate monitoring system for depositing dielectric … Expired / Lapsed 1962-10-01 1966-10-11 2 Details
US3277396A Means for modulating a laser Expired / Lapsed 1962-04-23 1966-10-04 2 Details
US3273397A Measurement of static force field gradients Expired / Lapsed 1964-06-05 1966-09-20 2 Details
US3251036A Electrical crossbar switching matrix having gate electrode … Expired / Lapsed 1962-10-01 1966-05-10 2 Details
FR1450129A Longitudinal controlled laser Expired / Lapsed 1965-10-14 1966-05-06 0 Details
US3245081A Multiple feed wide angle antenna utilizing biconcave spheri… Expired / Lapsed 1963-02-08 1966-04-05 2 Details
US3242491A Inverted v-beam antenna system Expired / Lapsed 1962-12-12 1966-03-22 2 Details
US3242494A Position determination system Expired / Lapsed 1962-01-25 1966-03-22 2 Details
US3241127A Magnetic domain shifting memory Expired / Lapsed 1961-07-28 1966-03-15 1 Details
US3238529A Multi-polarization receiving system Expired / Lapsed 1963-02-06 1966-03-01 2 Details
US3223944A Laser employing elliptical reflector cavity Expired / Lapsed 1964-06-25 1965-12-14 0 Details
US3223965A Shallow water depth alarm Expired / Lapsed 1963-01-23 1965-12-14 2 Details
US3223999A Resolution improvement devices Expired / Lapsed 1962-10-01 1965-12-14 1 Details
US3222454A Digital comparison circuits Expired / Lapsed 1962-06-18 1965-12-07 2 Details
US3218532A Numerically controlled positioning system Expired / Lapsed 1962-12-03 1965-11-16 2 Details
US3217219A Programmed digital to analog function generator motor contr… Expired / Lapsed 1961-12-29 1965-11-09 2 Details
US3215574A Method of making thin flexible plasticsealed printed circui… Expired / Lapsed 1963-03-25 1965-11-02 2 Details
US3202888A Micro-miniature semiconductor devices Expired / Lapsed 1962-02-09 1965-08-24 2 Details
US3199049A Optical maser system for obtaining short pulses of emitted … Expired / Lapsed 1961-08-18 1965-08-03 4 Details
US3192400A Semiconductive devices utilizing injection of current carri… Expired / Lapsed 1962-07-02 1965-06-29 2 Details
US3191205A Machine tool with feed rate control Expired / Lapsed 1962-02-28 1965-06-29 0 Details
US3188582A Rectangular waveguide microwave amplitude modulator with a … Expired / Lapsed 1964-01-10 1965-06-08 2 Details
US3182308A Composite display system Expired / Lapsed 1961-12-29 1965-05-04 2 Details
FR1396034A Single mode laser Expired / Lapsed 1964-04-27 1965-04-16 0 Details
US3178657A Optical maser system for production of repetitive short pul… Expired / Lapsed 1962-04-11 1965-04-13 1 Details
US3178592A Locking read amplifier with binary storage Expired / Lapsed 1962-04-10 1965-04-13 2 Details
US3177402A Over-current protective circuits Expired / Lapsed 1962-05-25 1965-04-06 2 Details
US3177348A Programmed flight computers Expired / Lapsed 1961-02-07 1965-04-06 2 Details
US3176224A Compressor-expander Expired / Lapsed 1960-11-25 1965-03-30 2 Details
US3173139A Radar systems Expired / Lapsed 1962-07-23 1965-03-09 2 Details
US3173078A Overload protective power supply Expired / Lapsed 1960-12-01 1965-03-09 2 Details
US3163844A Multiple-beam analog beam-forming system for sonar arrays Expired / Lapsed 1960-10-03 1964-12-29 2 Details
US3153149A Photosensitive electro-optical device with electrostatic sh… Expired / Lapsed 1962-08-20 1964-10-13 1 Details
US3149396A Method of making semiconductor assemblies Expired / Lapsed 1961-01-18 1964-09-22 2 Details
US3143109A Blood drawing device Expired / Lapsed 1962-02-12 1964-08-04 2 Details
US3143645A Two-way data compare-sort apparatus Expired / Lapsed 1961-02-01 1964-08-04 1 Details
US3141163A Range gating system with narrow band filtering Expired / Lapsed 1958-08-06 1964-07-14 2 Details
US3135638A Photochemical semiconductor mesa formation Expired / Lapsed 1960-10-27 1964-06-02 2 Details
US3133282A Apparatus providing a rotating directive antenna field patt… Expired / Lapsed 1961-09-28 1964-05-12 2 Details
US3132339A Sideband cancellation system Expired / Lapsed 1961-01-03 1964-05-05 1 Details
US3128332A Electrical interconnection grid and method of making same Expired / Lapsed 1960-03-30 1964-04-07 2 Details
US3127513A Pyrographite polarizer Expired / Lapsed 1961-01-30 1964-03-31 1 Details
US3117287A Transistor electronic attenuators Expired / Lapsed 1959-10-29 1964-01-07 1 Details
US3115588A Electroacoustical apparatus Expired / Lapsed 1958-02-05 1963-12-24 2 Details
US3114875A Microwave device for testing formations surrounding a boreh… Expired / Lapsed 1961-05-04 1963-12-17 2 Details
US3110022A Radar antenna speed reference apparatus Expired / Lapsed 1960-04-29 1963-11-05 2 Details
US3105160A Circuit providing a second parallel path for fast capacitor… Expired / Lapsed 1961-08-29 1963-09-24 2 Details
US3099832A Doppler navigation system Expired / Lapsed 1959-11-04 1963-07-30 2 Details
US3099805A Bidirectional coupling between waveguides via two nonrecipr… Expired / Lapsed 1956-01-09 1963-07-30 2 Details
US3098192A Protective circuit for direct current voltage regulators Expired / Lapsed 1961-02-06 1963-07-16 2 Details
US3095880A Diathermy applicators Expired / Lapsed 1958-11-24 1963-07-02 2 Details
US3095543A Means for modulating high frequency generators Expired / Lapsed 1959-06-22 1963-06-25 2 Details
US3094665A Means for the detection of signals in the presence of noise Expired / Lapsed 1959-04-27 1963-06-18 2 Details
US3092790A Directional filters Expired / Lapsed 1960-05-12 1963-06-04 2 Details
US3086139A Cathode ray storage tube Expired / Lapsed 1960-09-30 1963-04-16 2 Details
FR1323829A Solid state laser Expired / Lapsed 1962-04-09 1963-04-12 0 Details
US3083299A Apparatus for processing optically received electromagnetic… Expired / Lapsed 1959-09-25 1963-03-26 2 Details
US3083360A Electronic scanning radar system Expired / Lapsed 1958-04-01 1963-03-26 1 Details
US3075086A Diode bridge sampler and capacitor storage device with feed… Expired / Lapsed 1958-01-13 1963-01-22 2 Details
US3072857A Amplitude ratio detector circuit Expired / Lapsed 1960-03-02 1963-01-08 2 Details
US3068422A Traveling wave coupled cavity parametric amplifier Expired / Lapsed 1961-06-05 1962-12-11 0 Details
US3063025A Waveguide network Expired / Lapsed 1954-01-28 1962-11-06 0 Details
US3061755A Encapsulated electroluminescent device Expired / Lapsed 1959-11-27 1962-10-30 0 Details
US3060348A High speed circuit breakers Expired / Lapsed 1961-02-24 1962-10-23 0 Details
US3057977A Flow switches Expired / Lapsed 1959-11-27 1962-10-09 0 Details
US3054907A Complementary flip-flop utilizing auxiliary driving transis… Expired / Lapsed 1957-03-29 1962-09-18 0 Details
US3054068A Linear amplifier using transistors Expired / Lapsed 1960-03-14 1962-09-11 0 Details
US3053984A Star tracking system Expired / Lapsed 1951-01-05 1962-09-11 0 Details
US3041605A Electronically scanned antenna system Expired / Lapsed 1958-11-28 1962-06-26 0 Details
US3041561A Transformers Expired / Lapsed 1958-07-29 1962-06-26 0 Details
US3041226A Method of preparing semiconductor crystals Expired / Lapsed 1958-04-02 1962-06-26 2 Details
US3040197A Junction transistor having an improved current gain at high… Expired / Lapsed 1959-08-31 1962-06-19 0 Details
US3040311A Servo loops Expired / Lapsed 1950-10-05 1962-06-19 0 Details
US3039098A Finite focus wave energy antenna array Expired / Lapsed 1959-09-21 1962-06-12 0 Details
US3030582A Operational amplifier having direct current amplifier in wh… Expired / Lapsed 1959-10-01 1962-04-17 0 Details
US3030581A Electronic counter Expired / Lapsed 1958-07-01 1962-04-17 0 Details
US3028488A Satellite communication relay system utilizing modulation c… Expired / Lapsed 1960-02-01 1962-04-03 0 Details
US3028487A Digital phase demodulation circuit Expired / Lapsed 1958-05-01 1962-04-03 0 Details
US3026500A Electronic circuits for selectively shifting the time posit… Expired / Lapsed 1957-08-29 1962-03-20 0 Details
US3025191A Crystal-growing apparatus and methods Expired / Lapsed 1960-02-10 1962-03-13 2 Details
US3025433A Relay binary counter Expired / Lapsed 1959-06-01 1962-03-13 0 Details
US3023091A Methods of heating and levitating molten material Expired / Lapsed 1959-03-02 1962-02-27 2 Details
US3021521A Feed-through nulling systems Expired / Lapsed 1955-11-30 1962-02-13 0 Details
US3020493A Frequency modulation circuit Expired / Lapsed 1959-02-27 1962-02-06 0 Details
US3020483A Signal recognition circuit using pulse position modulation … Expired / Lapsed 1958-03-03 1962-02-06 0 Details
US3017583A Large angle rf phase shifters Expired / Lapsed 1958-06-06 1962-01-16 0 Details
US3017630A Radar scanning system Expired / Lapsed 1952-12-19 1962-01-16 0 Details
US3015884A Method of storing a material within another material Expired / Lapsed 1957-10-16 1962-01-09 2 Details
US3014210A Devices employing the precession resonance of paramagnetic … Expired / Lapsed 1951-05-31 1961-12-19 0 Details
US3013249A Sort-completion detection apparatus Expired / Lapsed 1960-07-25 1961-12-12 0 Details
US3005986A Parallel strip transmission antenna array Expired / Lapsed 1956-06-01 1961-10-24 0 Details
US3004253A Iff system Expired / Lapsed 1954-12-20 1961-10-10 0 Details
US3003092A Electric motor control system Expired / Lapsed 1959-11-30 1961-10-03 0 Details
US3001190A Echo ranging devices Expired / Lapsed 1953-01-29 1961-09-19 0 Details
US2998591A Audible fish alarms Expired / Lapsed 1955-01-21 1961-08-29 0 Details
US2995750A Radar receiver system Expired / Lapsed 1958-09-02 1961-08-08 0 Details
US2994810A Auxiliary emitter transistor Expired / Lapsed 1955-11-04 1961-08-01 0 Details
US2992340A Amplitude discriminating system Expired / Lapsed 1956-12-21 1961-07-11 0 Details
US2992423A Rocket launch control systems Expired / Lapsed 1954-05-03 1961-07-11 0 Details
US2985836A Slicing circuits Expired / Lapsed 1958-05-02 1961-05-23 0 Details
US2984822A Two-way data compare-sort apparatus Expired / Lapsed 1958-11-28 1961-05-16 0 Details
US2983786A Optical scanning device Expired / Lapsed 1958-08-29 1961-05-09 0 Details
US2982892A Semiconductor device and method of making the same Expired / Lapsed 1958-06-11 1961-05-02 0 Details
US2982883A Electrical component locking arrangement Expired / Lapsed 1957-08-23 1961-05-02 0 Details
US2982955A Moving target indicating system Expired / Lapsed 1950-07-25 1961-05-02 0 Details
US2982954A Radar system for producing a remote plan position indication Expired / Lapsed 1947-04-29 1961-05-02 0 Details
US2980803A Intelligence control systems Expired / Lapsed 1955-03-11 1961-04-18 0 Details
US2978615A Electric trigger circuits Expired / Lapsed 1957-05-01 1961-04-04 0 Details
US2978565A Insulated wire strippers Expired / Lapsed 1957-02-12 1961-04-04 0 Details
US2977467A Signal seeking receiver Expired / Lapsed 1959-04-07 1961-03-28 0 Details
US2972120A Variable-frequency crystal-controlled oscillator systems Expired / Lapsed 1957-10-15 1961-02-14 0 Details
US2969913A Circuits for selectively shifting, extracting, and insertin… Expired / Lapsed 1954-02-23 1961-01-31 0 Details
US2963637A Voltage regulator Expired / Lapsed 1956-12-03 1960-12-06 0 Details
US2963680A Electrical reactance devices Expired / Lapsed 1956-03-19 1960-12-06 0 Details
US2963653A Optimum biasing binary threshold device for responding to p… Expired / Lapsed 1955-06-07 1960-12-06 0 Details
US2961613A Linear frequency discriminator Expired / Lapsed 1956-01-19 1960-11-22 0 Details
US2960015A Method and means for making circular variable density filte… Expired / Lapsed 1956-09-24 1960-11-15 0 Details
US2952845A Instrument approach and landing system for aircraft Expired / Lapsed 1955-09-16 1960-09-13 0 Details
US2949931A Magnetic check valve Expired / Lapsed 1958-01-29 1960-08-23 0 Details
US2949773A Measurement of relative velocity between fluid and solid bo… Expired / Lapsed 1955-01-20 1960-08-23 0 Details
US2945401A Machine tool Expired / Lapsed 1959-04-01 1960-07-19 0 Details
US2945964A Pulsed output transistor flip-flop Expired / Lapsed 1956-10-31 1960-07-19 0 Details
US2944875A Crystal-growing apparatus and methods Expired / Lapsed 1953-07-13 1960-07-12 2 Details
US2943296A Sonic apparatus for measuring the level of stored materials Expired / Lapsed 1955-08-09 1960-06-28 0 Details
US2936116A Electronic digital computer Expired / Lapsed 1952-11-12 1960-05-10 0 Details
US2935735A Magnetic control systems Expired / Lapsed 1955-03-08 1960-05-03 0 Details
US2932471A Broad bandwidth digital servo Expired / Lapsed 1954-09-30 1960-04-12 0 Details
US2930028A Circuits for selectively shifting, extracting, and insertin… Expired / Lapsed 1953-12-07 1960-03-22 0 Details
US2929058A Sequential lobing system with ferrite phase shifters Expired / Lapsed 1955-04-04 1960-03-15 0 Details
US2926341A Automatic timing track recording apparatus Expired / Lapsed 1956-02-01 1960-02-23 0 Details
US2923589A Block identifying marker system Expired / Lapsed 1955-01-26 1960-02-02 0 Details
US2921999A Inertia switch Expired / Lapsed 1957-04-01 1960-01-19 0 Details
US2919432A Magnetic device Expired / Lapsed 1957-02-28 1959-12-29 0 Details
US2918666A Condition responsive electrical system Expired / Lapsed 1956-07-30 1959-12-22 0 Details
US2918587A Clock-pulse insertion circuit Expired / Lapsed 1956-04-02 1959-12-22 0 Details
US2915678A Electrical mounting devices Expired / Lapsed 1955-06-14 1959-12-01 0 Details
US2915747A Echo ranging system Expired / Lapsed 1950-10-05 1959-12-01 0 Details
US2914762A Dual channel noise coherence reducers Expired / Lapsed 1954-02-24 1959-11-24 0 Details
US2911555A Traveling-wave tube Expired / Lapsed 1957-09-04 1959-11-03 0 Details
US2909659A Pulse shaping circuits Expired / Lapsed 1957-09-03 1959-10-20 0 Details
US2909635A Electronic oven systems Expired / Lapsed 1957-07-29 1959-10-20 0 Details
US2908888A Acoustic logs Expired / Lapsed 1956-03-16 1959-10-13 0 Details
US2907877A Algebraic magnitude comparators Expired / Lapsed 1954-05-18 1959-10-06 0 Details
US2905887A Comparison circuit Expired / Lapsed 1955-05-05 1959-09-22 0 Details
US2904404A Preparation of silicon Expired / Lapsed 1957-01-09 1959-09-15 2 Details
US2903677A Timing track recording apparatus Expired / Lapsed 1956-01-13 1959-09-08 0 Details
US2900271A Electroluminescent devices and methods therefor Expired / Lapsed 1958-07-29 1959-08-18 1 Details
US2900534A Phase discriminator Expired / Lapsed 1957-09-30 1959-08-18 0 Details
US2900620A Electronic magnitude comparator Expired / Lapsed 1953-11-25 1959-08-18 0 Details
US2898479A Clock pulse circuit for transistor flip-flop Expired / Lapsed 1957-06-28 1959-08-04 0 Details
US2897462A Variable reluctance electromagnetic device Expired / Lapsed 1956-06-01 1959-07-28 0 Details
US2895858A Method of producing semiconductor crystal bodies Expired / Lapsed 1955-06-21 1959-07-21 1 Details
US2896117A Linear magnetron traveling wave tube Expired / Lapsed 1955-02-28 1959-07-21 0 Details
US2896198A Electrical analog-to-digital converter Expired / Lapsed 1953-04-28 1959-07-21 0 Details
US2895131A Microwave scanning antennas Expired / Lapsed 1954-09-17 1959-07-14 0 Details
US2894184A Electrical characteristics of diodes Expired / Lapsed 1955-06-29 1959-07-07 0 Details
US2894254A Conversion of binary coded information to pulse pattern form Expired / Lapsed 1953-12-10 1959-07-07 0 Details
US2892984A Microwave circuit controls Expired / Lapsed 1955-06-17 1959-06-30 0 Details
US2889393A Connecting means for etched circuitry Expired / Lapsed 1956-07-26 1959-06-02 0 Details
US2887129A Liquid metering device Expired / Lapsed 1956-01-10 1959-05-19 0 Details
US2887654A Electronic tachometer with selected expanded scale Expired / Lapsed 1955-04-19 1959-05-19 0 Details
US2885163A Aircraft control console Expired / Lapsed 1954-07-13 1959-05-05 0 Details
US2884558A Cathode-ray tube for presenting stored and non-stored displ… Expired / Lapsed 1955-12-19 1959-04-28 0 Details
US2882464A Transistor assemblies Expired / Lapsed 1956-05-01 1959-04-14 0 Details
US2878448A Frequency calibration system Expired / Lapsed 1956-06-01 1959-03-17 0 Details
US2877144A Vitreous coated magnetic material Expired / Lapsed 1954-05-19 1959-03-10 2 Details
US2876437A Electronic circuits for selectively shifting or inverting t… Expired / Lapsed 1953-12-28 1959-03-03 0 Details
US2875377A Electron discharge devices Expired / Lapsed 1956-10-16 1959-02-24 0 Details
US2874076A Semiconductor translating devices Expired / Lapsed 1957-11-29 1959-02-17 2 Details
US2873422A Magnetic amplifier pulse generators Expired / Lapsed 1958-01-31 1959-02-10 0 Details
US2872655A Electrical connectors and attaching means therefor Expired / Lapsed 1956-08-31 1959-02-03 0 Details
US2869804A Acceleration responsive control surface control limiting sy… Expired / Lapsed 1955-07-26 1959-01-20 0 Details
US2870441A Microwave antennas Expired / Lapsed 1952-10-23 1959-01-20 0 Details
US2868997A Switching circuits Expired / Lapsed 1958-05-13 1959-01-13 0 Details
US2868897A Low output impedance semiconductor amplifier Expired / Lapsed 1956-10-30 1959-01-13 0 Details
US2866506A Digital systems for the automatic control of machinery Expired / Lapsed 1954-10-25 1958-12-30 0 Details
US2866920A Magnetron modulator systems Expired / Lapsed 1954-09-20 1958-12-30 0 Details
US2865564A High-speed electronic data conversion system Expired / Lapsed 1953-04-02 1958-12-23 0 Details
US2865018A Intelligence transmission Expired / Lapsed 1954-06-25 1958-12-16 0 Details
US2862159A Conduction cooled rectifiers Expired / Lapsed 1954-10-29 1958-11-25 0 Details
US2859644A Machine tool Expired / Lapsed 1958-01-02 1958-11-11 0 Details
US2859033A Constant force applying mechanism Expired / Lapsed 1956-06-27 1958-11-04 0 Details
US2859347A Phase discriminators Expired / Lapsed 1956-05-16 1958-11-04 0 Details
US2859440A Identification system for airports Expired / Lapsed 1956-03-02 1958-11-04 0 Details
US2857577A Electrical connector Expired / Lapsed 1955-11-01 1958-10-21 0 Details
US2856497A Dielectric matching devices Expired / Lapsed 1954-04-29 1958-10-14 0 Details
US2856256A Coded magnetic binary recorders Expired / Lapsed 1951-10-31 1958-10-14 0 Details
US2854366A Method of making fused junction semiconductor devices Expired / Lapsed 1957-11-25 1958-09-30 2 Details
US2854610A Semiconductor transistor device Expired / Lapsed 1955-03-24 1958-09-30 0 Details
US2853238A Binary-coded flip-flop counters Expired / Lapsed 1952-12-20 1958-09-23 0 Details
US2852699A Magnetic core gating circuits Expired / Lapsed 1955-03-23 1958-09-16 0 Details
US2850566A High-speed printing system Expired / Lapsed 1953-09-08 1958-09-02 0 Details
US2848698A Variable reluctance electromagnetic devices Expired / Lapsed 1957-04-01 1958-08-19 0 Details
US2847632A Electric motor controls Expired / Lapsed 1957-04-25 1958-08-12 0 Details
US2847659A Coupling circuit for magnetic binaries Expired / Lapsed 1956-02-16 1958-08-12 0 Details
US2846626A Junction transistors and methods of forming them Expired / Lapsed 1954-07-28 1958-08-05 0 Details
US2843743A Pulse generator Expired / Lapsed 1955-11-04 1958-07-15 0 Details
US2843515A Semiconductive devices Expired / Lapsed 1955-08-30 1958-07-15 2 Details
US2843806A Cross-cooled cabinet for electrical equipment Expired / Lapsed 1955-04-29 1958-07-15 0 Details
US2843351A Balanced servo valve Expired / Lapsed 1955-01-31 1958-07-15 0 Details
US2841775A Frequency responsive systems Expired / Lapsed 1950-05-25 1958-07-01 0 Details
US2840709A Frequency to digital conversion Expired / Lapsed 1956-07-02 1958-06-24 0 Details
US2840806A Voltage state to digital converter Expired / Lapsed 1955-10-12 1958-06-24 0 Details
US2840308A Electronic correlator Expired / Lapsed 1955-06-02 1958-06-24 0 Details
US2840818A Slotted antenna Expired / Lapsed 1954-04-15 1958-06-24 0 Details
US2837644A Time discriminator Expired / Lapsed 1955-07-15 1958-06-03 0 Details
US2837732A Electronic magnitude comparator Expired / Lapsed 1953-11-25 1958-06-03 0 Details
US2836784A Power supply Expired / Lapsed 1953-05-26 1958-05-27 0 Details
US2836356A Analog-to-digital converter Expired / Lapsed 1952-02-21 1958-05-27 0 Details
US2834011A Binary cyclical encoder Expired / Lapsed 1954-09-29 1958-05-06 0 Details
US2833657A Microwave irradiation of fruit juices Expired / Lapsed 1954-01-08 1958-05-06 2 Details
US2832702A Method of treating semiconductor bodies for translating dev… Expired / Lapsed 1955-08-18 1958-04-29 1 Details
US2832070A Binary decoder Expired / Lapsed 1956-01-04 1958-04-22 0 Details
US2830238A Heat dissipating semiconductor device Expired / Lapsed 1955-09-30 1958-04-08 2 Details
US2830199A Pulse generating circuits Expired / Lapsed 1954-11-30 1958-04-08 0 Details
US2830162A Heating method and apparatus Expired / Lapsed 1954-06-22 1958-04-08 0 Details
US2829992A Fused junction semiconductor devices and method of making s… Expired / Lapsed 1954-02-02 1958-04-08 1 Details
US2828232A Method for producing junctions in semi-conductor device Expired / Lapsed 1956-05-01 1958-03-25 2 Details
US2827565A Current regulators Expired / Lapsed 1954-02-17 1958-03-18 0 Details
US2827537A Electronic heating apparatus Expired / Lapsed 1953-11-12 1958-03-18 0 Details
US2825884A Echo ranging devices Expired / Lapsed 1953-05-14 1958-03-04 0 Details
US2824243A Compression type accelerometer Expired / Lapsed 1956-06-01 1958-02-18 0 Details
US2824259A Virtual flood-electron source Expired / Lapsed 1955-06-06 1958-02-18 0 Details
US2824287A Signal-amplitude to pulse-duration converter Expired / Lapsed 1955-05-13 1958-02-18 0 Details
US2823678A Diathermy power controls Expired / Lapsed 1954-04-29 1958-02-18 0 Details
US2823855A Serial arithmetic units for binary-coded decimal computers Expired / Lapsed 1952-11-26 1958-02-18 0 Details
US2822502A Slow-wave structure Expired / Lapsed 1955-04-05 1958-02-04 0 Details
FR1151572A Manufacturing process of semiconductor devices, with an eva… Expired / Lapsed 1956-05-07 1958-01-31 0 Details
US2821493A Fused junction transistors with regrown base regions Expired / Lapsed 1954-03-18 1958-01-28 2 Details
US2821696A Electronic multiple comparator Expired / Lapsed 1953-11-25 1958-01-28 0 Details
US2820143A Transistor phase detector Expired / Lapsed 1955-04-19 1958-01-14 0 Details
US2818536A Point contact semiconductor devices and methods of making s… Expired / Lapsed 1952-08-23 1957-12-31 1 Details
US2817480A Electronic data translating system Expired / Lapsed 1954-05-17 1957-12-24 0 Details
US2816226A Counter circuit Expired / Lapsed 1956-12-31 1957-12-10 0 Details
US2816237A System for coupling signals into and out of flip-flops Expired / Lapsed 1955-05-31 1957-12-10 0 Details
US2816223A Binary-coded, flip-flop counters Expired / Lapsed 1952-12-23 1957-12-10 0 Details
US2815303A Method of making junction single crystals Expired / Lapsed 1953-07-24 1957-12-03 2 Details
US2815168A Automatic program control system for a digital computer Expired / Lapsed 1951-11-14 1957-12-03 0 Details
US2814736A Linear saw-tooth wave generator Expired / Lapsed 1956-05-14 1957-11-26 0 Details
US2814774A Continuity and short tester Expired / Lapsed 1955-12-02 1957-11-26 0 Details
US2814745A High frequency alternator Expired / Lapsed 1955-10-31 1957-11-26 0 Details
US2814725A Time discriminator Expired / Lapsed 1953-05-21 1957-11-26 0 Details
US2812435A Time discriminator Expired / Lapsed 1954-10-05 1957-11-05 0 Details
US2812472A Pulse edge brightening circuit Expired / Lapsed 1954-03-03 1957-11-05 0 Details
US2811591A Feedback network compensations Expired / Lapsed 1954-08-30 1957-10-29 0 Details
US2810025A Direct-coupled feedback amplifier Expired / Lapsed 1954-07-15 1957-10-15 0 Details
US2808650A Direction sensing and displacement detection apparatus Expired / Lapsed 1956-08-16 1957-10-08 0 Details
US2808586A Arrangement for controlling edge diffraction of microwaves Expired / Lapsed 1953-11-27 1957-10-01 0 Details
US2806628A Tear tabs for tin cans and methods for forming them Expired / Lapsed 1955-05-27 1957-09-17 0 Details
US2806972A Traveling-wave tube Expired / Lapsed 1954-12-08 1957-09-17 0 Details
US2806947A Method and circuits for synchronizing counters Expired / Lapsed 1954-05-12 1957-09-17 0 Details
US2807002A Delay selection matrices Expired / Lapsed 1954-03-12 1957-09-17 0 Details
US2806946A Pulse coincidence circuit Expired / Lapsed 1952-06-02 1957-09-17 0 Details
US2806080A Bushings Expired / Lapsed 1953-04-03 1957-09-10 0 Details
US2804605A Magnetic recording playback circuits Expired / Lapsed 1954-03-19 1957-08-27 0 Details
US2803401A Arithmetic units for digital computers Expired / Lapsed 1956-08-31 1957-08-20 0 Details
US2802159A Junction-type semiconductor devices Expired / Lapsed 1953-10-20 1957-08-06 1 Details
US2801049A Doppler miss simulator Expired / Lapsed 1951-06-20 1957-07-30 0 Details
US2800073A High speed paper advance system Expired / Lapsed 1954-12-17 1957-07-23 0 Details
US2799845A Time selection devices Expired / Lapsed 1953-07-23 1957-07-16 0 Details
US2799727A Electronic commutated channel separators Expired / Lapsed 1952-11-08 1957-07-16 0 Details
US2798781A Apparatus for housing and transporting electronic components Expired / Lapsed 1954-04-08 1957-07-09 0 Details
US2797401A Electronic timing pulse generator Expired / Lapsed 1954-05-20 1957-06-25 0 Details
US2795727A Direct-viewing electronic storage tubes Expired / Lapsed 1952-01-12 1957-06-11 0 Details
US2795780A Radar relay links Expired / Lapsed 1951-12-21 1957-06-11 0 Details
US2794180A Magnetic memory drum Expired / Lapsed 1955-12-01 1957-05-28 0 Details
US2793335A Electrical servo system Expired / Lapsed 1954-09-14 1957-05-21 0 Details
US2792829A Frequency modulated ultrasonic therapeutic apparatus Expired / Lapsed 1952-02-06 1957-05-21 0 Details
US2789557A Ultrasonic therapeutic devices Expired / Lapsed 1952-01-07 1957-04-23 0 Details
US2788381A Fused-junction semiconductor photocells Expired / Lapsed 1955-07-26 1957-04-09 2 Details
US2787418A Analogue-to-digital converter system Expired / Lapsed 1952-06-14 1957-04-02 0 Details
US2787416A Electrical calculating machines Expired / Lapsed 1951-10-23 1957-04-02 0 Details
US2784396A High-speed electronic analogue-todigital converter system Expired / Lapsed 1953-04-02 1957-03-05 0 Details
US2782398A Apparatus for photoelectrically cataloging digital data on … Expired / Lapsed 1953-08-28 1957-02-19 0 Details
US2776618A Printing cylinders for high-speed printing systems Expired / Lapsed 1953-06-11 1957-01-08 0 Details
US2775721A Electron discharge devices Expired / Lapsed 1953-09-14 1956-12-25 0 Details
US2774941A Communication systems Expired / Lapsed 1952-11-14 1956-12-18 0 Details
US2774068A Diathermy applicators Expired / Lapsed 1953-02-16 1956-12-11 0 Details
US2766686A High speed electro-mechanical interference-type transducer Expired / Lapsed 1953-09-01 1956-10-16 0 Details
US2765115A Arithmetic adders Expired / Lapsed 1951-10-30 1956-10-02 0 Details
US2764343A Electronic switching and counting circuit Expired / Lapsed 1952-02-25 1956-09-25 0 Details
US2763581A Process of making p-n junction crystals Expired / Lapsed 1952-11-25 1956-09-18 2 Details
US2763757A Microwave ovens Expired / Lapsed 1952-02-08 1956-09-18 0 Details
US2762936A Diode, pulse-gating circuits Expired / Lapsed 1952-12-20 1956-09-11 0 Details
US2761089A Half-tone storage tubes Expired / Lapsed 1952-01-03 1956-08-28 0 Details
US2760127A Capacitor commutator Expired / Lapsed 1954-03-22 1956-08-21 0 Details
US2760186A Visual indicating devices Expired / Lapsed 1953-04-09 1956-08-21 0 Details
US2758204A Wide-band phase shifter network Expired / Lapsed 1955-08-16 1956-08-07 0 Details
US2758206A Transistor pulse generator Expired / Lapsed 1955-08-03 1956-08-07 0 Details
US2757279A Two-way communication systems Expired / Lapsed 1951-11-20 1956-07-31 0 Details
US2755338A Electronic commutation system Expired / Lapsed 1952-03-05 1956-07-17 0 Details
US2752154A Card receiving station Expired / Lapsed 1955-05-02 1956-06-26 0 Details
US2750574A Echo-ranging devices Expired / Lapsed 1953-04-15 1956-06-12 0 Details
US2748298A Ultrasonic vibratory devices Expired / Lapsed 1955-01-12 1956-05-29 0 Details
US2748312A Cathode-ray storage tube system Expired / Lapsed 1954-11-19 1956-05-29 0 Details
US2747797A Rotational analogue-to-digital converters Expired / Lapsed 1951-08-20 1956-05-29 0 Details
US2745972A Electronic position and motion control systems Expired / Lapsed 1953-12-09 1956-05-15 0 Details
US2744169A Pulse amplifier Expired / Lapsed 1955-02-07 1956-05-01 0 Details
US2743201A Monatomic semiconductor devices Expired / Lapsed 1952-04-29 1956-04-24 2 Details
US2742383A Germanium junction-type semiconductor devices Expired / Lapsed 1952-08-09 1956-04-17 2 Details
US2740294A Wind drift computers Expired / Lapsed 1952-12-31 1956-04-03 0 Details
US2740259A Apparatus for converting gas pressure to hydraulic pressure Expired / Lapsed 1952-05-01 1956-04-03 0 Details
US2739882A Surface treatment of germanium Expired / Lapsed 1954-02-25 1956-03-27 1 Details
US2740097A Electrical hinge connector for circuit boards Expired / Lapsed 1951-04-19 1956-03-27 0 Details
US2738259A Surface treatment of germanium Expired / Lapsed 1954-02-24 1956-03-13 1 Details
US2738461A Method and apparatus for measuring time intervals Expired / Lapsed 1951-03-15 1956-03-13 0 Details
US2737601A Semiconductor variable circuit Expired / Lapsed 1952-11-05 1956-03-06 0 Details
US2736847A Fused-junction silicon diodes Expired / Lapsed 1954-05-10 1956-02-28 2 Details
US2736889A High-speed electronic digital-to-analogue converter system Expired / Lapsed 1953-04-02 1956-02-28 0 Details
US2731704A Method of making transistors Expired / Lapsed 1952-12-27 1956-01-24 2 Details
US2730632A Diode gating circuit Expired / Lapsed 1952-02-01 1956-01-10 0 Details
US2730616A Automatic frequency-control circuits Expired / Lapsed 1951-03-15 1956-01-10 0 Details
US2729910A Controllable depth maintaining devices Expired / Lapsed 1950-04-26 1956-01-10 0 Details
US2729814A Reliability indicators Expired / Lapsed 1952-08-15 1956-01-03 0 Details
US2728872A Direct-viewing storage tube with character writing electron… Expired / Lapsed 1953-10-23 1955-12-27 0 Details
US2725554A System for recording discontinuous signals in continuous se… Expired / Lapsed 1952-07-05 1955-11-29 0 Details
US2723080A Triggering networks for flip-flop circuits Expired / Lapsed 1951-09-08 1955-11-08 0 Details
US2722607A Frequency control Expired / Lapsed 1951-02-23 1955-11-01 0 Details
US2721259A Method and system for signalling having spectral modulation Expired / Lapsed 1952-05-31 1955-10-18 0 Details
US2720617A Transistor packages Expired / Lapsed 1953-11-02 1955-10-11 0 Details
US2718634A Digital-to-analogue converter Expired / Lapsed 1951-07-28 1955-09-20 0 Details
US2717310A Direct current electronic integrating system Expired / Lapsed 1952-11-13 1955-09-06 0 Details
US2716217A Communication system Expired / Lapsed 1950-07-29 1955-08-23 0 Details
US2714185A Anti-hunt means for electric motor follow-up system Expired / Lapsed 1954-09-14 1955-07-26 0 Details
US2714070A Microwave heating apparatus and method of heating a food pa… Expired / Lapsed 1950-04-04 1955-07-26 1 Details
US2713263A Ullage measuring devices Expired / Lapsed 1952-07-07 1955-07-19 0 Details
US2709770A Stepped signal producing system Expired / Lapsed 1951-08-15 1955-05-31 0 Details
US2708718A Phase detector Expired / Lapsed 1952-11-26 1955-05-17 0 Details
US2708646A Methods of making germanium alloy semiconductors Expired / Lapsed 1951-05-09 1955-05-17 2 Details
US2707591A Multiple-stable-state storage devices Expired / Lapsed 1952-05-07 1955-05-03 0 Details
US2704802A Microwave ovens Expired / Lapsed 1952-05-22 1955-03-22 0 Details
US2704333A Ultrasonic vibratory devices Expired / Lapsed 1951-03-15 1955-03-15 0 Details
US2703853A Folding terminal board for circuit components Expired / Lapsed 1952-01-18 1955-03-08 0 Details
US2703382A Two-way limiting network Expired / Lapsed 1952-12-11 1955-03-01 0 Details
US2703079A Method of and apparatus for determining the oxygen content … Expired / Lapsed 1951-08-13 1955-03-01 4 Details
US2701346A Connector for circuit cards Expired / Lapsed 1953-11-05 1955-02-01 0 Details
US2701328A Antihunt means for electric motor follow-up systems Expired / Lapsed 1949-07-29 1955-02-01 0 Details
US2700741A Beam internsifier circuit Expired / Lapsed 1947-11-28 1955-01-25 0 Details
US2697811A Current limiting voltage regulator Expired / Lapsed 1954-02-03 1954-12-21 0 Details
US2695165A Electromagnetic accelerometer Expired / Lapsed 1950-07-14 1954-11-23 0 Details
US2694149A Electronic regulator system Expired / Lapsed 1950-06-29 1954-11-09 0 Details
US2694168A Glass-sealed semiconductor crystal device Expired / Lapsed 1950-03-31 1954-11-09 4 Details
US2688076A Reversible triangular wave generator Expired / Lapsed 1952-03-05 1954-08-31 0 Details
US2685073A Detachable electrical connector Expired / Lapsed 1952-10-31 1954-07-27 0 Details
US2685039A Diode gating circuits Expired / Lapsed 1952-03-13 1954-07-27 0 Details
US2685079A Flutter compensation means for recording systems Expired / Lapsed 1951-02-07 1954-07-27 0 Details
US2682511A Thermionic cathodes Expired / Lapsed 1950-12-16 1954-06-29 2 Details
US2680333A Tool chuck for vibrating devices Expired / Lapsed 1951-03-16 1954-06-08 0 Details
US2673306A Magnetron amplifier Expired / Lapsed 1949-03-16 1954-03-23 0 Details
US2671853A Energy radiation apparatus Expired / Lapsed 1952-03-01 1954-03-09 0 Details
US2662981A Wave form generating circuits Expired / Lapsed 1950-10-04 1953-12-15 0 Details
US2659818A High-frequency directed radio energy system Expired / Lapsed 1950-07-21 1953-11-17 0 Details
US2659856A Duration ratio regulator Expired / Lapsed 1948-04-21 1953-11-17 0 Details
US2658139A Binary decoding system Expired / Lapsed 1950-03-29 1953-11-03 0 Details
US2652525A Electric motor control Expired / Lapsed 1952-08-16 1953-09-15 0 Details
US2652475A Microwave apparatus Expired / Lapsed 1950-06-07 1953-09-15 0 Details
US2648060A Coded impulse responsive secret signaling system Expired / Lapsed 1948-03-13 1953-08-04 0 Details
US2638588A Electromagnetic-radiating system Expired / Lapsed 1950-10-20 1953-05-12 0 Details
US2634052A Diagnostic information monitoring system Expired / Lapsed 1949-04-27 1953-04-07 0 Details
US2633894A Plastic welding Expired / Lapsed 1948-04-21 1953-04-07 0 Details
US2632858A Support for vibratory devices Expired / Lapsed 1950-11-16 1953-03-24 0 Details
US2627055A Electronic position and motion control system Expired / Lapsed 1949-10-25 1953-01-27 0 Details
US2623116A Recording device Expired / Lapsed 1947-11-21 1952-12-23 0 Details
US2622187A Microwave pressure cooker Expired / Lapsed 1947-01-14 1952-12-16 0 Details
US2618735A Heating apparatus Expired / Lapsed 1947-01-11 1952-11-18 0 Details
US2617039A Harmonic frequency selector Expired / Lapsed 1947-04-29 1952-11-04 0 Details
US2616982A Magnetic recorder Expired / Lapsed 1946-08-24 1952-11-04 0 Details
US2616048A Relaxation oscillator circuits Expired / Lapsed 1948-03-23 1952-10-28 0 Details
US2610244A Depth sounding apparatus Expired / Lapsed 1945-06-05 1952-09-09 0 Details
US2607006A Binary decoding system Expired / Lapsed 1950-03-22 1952-08-12 0 Details
US2606228A Guiding device for contact leads of electrical elements und… Expired / Lapsed 1948-02-14 1952-08-05 0 Details
US2601178A Method for producing fluorescent screens Expired / Lapsed 1950-06-09 1952-06-17 2 Details
US2601067A Coffee brewing Expired / Lapsed 1948-03-24 1952-06-17 0 Details
US2599033A High-frequency apparatus Expired / Lapsed 1946-11-15 1952-06-03 0 Details
US2591350A Traveling-wave electron reaction device Expired / Lapsed 1947-04-26 1952-04-01 0 Details
US2586993A Balanced duplexer Expired / Lapsed 1948-07-30 1952-02-26 0 Details
US2586754A Radio-frequency system Expired / Lapsed 1946-11-16 1952-02-19 0 Details
US2585173A Radio-frequency transmission line circuit Expired / Lapsed 1948-07-01 1952-02-12 0 Details
US2582174A Electronic cooking Expired / Lapsed 1949-10-22 1952-01-08 0 Details
US2576395A Recording and indicating system Expired / Lapsed 1948-10-28 1951-11-27 0 Details
US2568090A Balanced mixer Expired / Lapsed 1948-06-22 1951-09-18 0 Details
US2567757A Therapeutic device Expired / Lapsed 1947-02-26 1951-09-11 0 Details
US2560903A Wave guide dielectric heating apparatus Expired / Lapsed 1949-08-27 1951-07-17 0 Details
US2560124A Interval measuring system Expired / Lapsed 1950-03-31 1951-07-10 0 Details
US2560066A Hydrophone mounting Expired / Lapsed 1948-11-27 1951-07-10 0 Details
US2559575A Electrical control system Expired / Lapsed 1947-01-31 1951-07-03 0 Details
US2557798A Measuring and recording device Expired / Lapsed 1946-03-19 1951-06-19 0 Details
US2548789A Electronic storage device Expired / Lapsed 1948-12-08 1951-04-10 0 Details
US2547638A Image storage tube Expired / Lapsed 1948-12-18 1951-04-03 0 Details
US2547890A Electrical circuits Expired / Lapsed 1948-05-25 1951-04-03 0 Details
US2546500A Electrical circuits Expired / Lapsed 1947-01-22 1951-03-27 0 Details
US2543887A Magnetron power supply circuits Expired / Lapsed 1947-03-11 1951-03-06 0 Details
US2540036A Food cooking Expired / Lapsed 1948-03-26 1951-01-30 2 Details
US2539553A Recording system Expired / Lapsed 1945-10-19 1951-01-30 0 Details
US2534271A Antenna system Expired / Lapsed 1947-10-17 1950-12-19 0 Details
US2530705A Electrical control systems Expired / Lapsed 1943-04-15 1950-11-21 0 Details
US2524252A Electron accelerator of the microwave type Expired / Lapsed 1948-02-05 1950-10-03 0 Details
US2524573A Method for producing dispersions Expired / Lapsed 1946-01-24 1950-10-03 0 Details
US2523222A Frequency modulation system Expired / Lapsed 1947-04-05 1950-09-19 0 Details
US2517635A Radar marker circuit Expired / Lapsed 1949-02-16 1950-08-08 0 Details
US2509419A Amplifier of the magnetron type Expired / Lapsed 1945-04-09 1950-05-30 0 Details
US2504231A Gaseous discharge device Expired / Lapsed 1945-10-26 1950-04-18 0 Details
US2502405A Electron-discharge device of the magnetron type Expired / Lapsed 1948-12-20 1950-03-28 0 Details
US2501400A Method of food preparation Expired / Lapsed 1949-12-27 1950-03-21 2 Details
US2500676A Heating apparatus Expired / Lapsed 1947-01-14 1950-03-14 0 Details
US2499520A Distance measuring device Expired / Lapsed 1947-01-31 1950-03-07 0 Details
US2496424A Radio tuning device Expired / Lapsed 1946-07-10 1950-02-07 0 Details
US2495435A Method of treating foodstuffs Expired / Lapsed 1947-01-14 1950-01-24 2 Details
US2495415A High-frequency electromagnetic cooking apparatus Expired / Lapsed 1945-10-17 1950-01-24 0 Details
US2495429A Method of treating foodstuffs Expired / Lapsed 1945-10-08 1950-01-24 2 Details
US2486021A Oscillator Expired / Lapsed 1945-02-28 1949-10-25 0 Details
US2485124A Harmonic generator Expired / Lapsed 1946-11-30 1949-10-18 0 Details
US2480679A Prepared food article and method of preparing Expired / Lapsed 1947-03-29 1949-08-30 0 Details
US2480682A Microwave heating apparatus using circularly polarized horn Expired / Lapsed 1946-09-21 1949-08-30 0 Details
US2480646A Speed measuring device Expired / Lapsed 1945-01-17 1949-08-30 0 Details
US2478207A Vibrating apparatus Expired / Lapsed 1945-09-05 1949-08-09 0 Details
US2477601A Directly heated cathode Expired / Lapsed 1947-06-11 1949-08-02 0 Details
US2477622A Condenser welding system Expired / Lapsed 1945-05-01 1949-08-02 0 Details
US2477428A Communication relay station Expired / Lapsed 1946-11-06 1949-07-26 0 Details
US2476940A Subminiature type vacuum tube structure Expired / Lapsed 1947-05-22 1949-07-19 0 Details
US2475621A Inverter Expired / Lapsed 1945-09-20 1949-07-12 0 Details
US2473567A Electronic discharge device Expired / Lapsed 1945-03-20 1949-06-21 0 Details
US2474137A Coupling system for wave guides Expired / Lapsed 1944-02-15 1949-06-21 0 Details
US2468129A Cathode support Expired / Lapsed 1947-08-20 1949-04-26 0 Details
US2468080A Voltage regulation Expired / Lapsed 1947-01-31 1949-04-26 0 Details
US2468417A Cascade amplifying circuit using gaseous discharge tubes Expired / Lapsed 1946-10-17 1949-04-26 0 Details
US2468029A Frequency stabilizing device Expired / Lapsed 1946-04-09 1949-04-26 0 Details
US2466028A Controlled peaking transformer Expired / Lapsed 1945-05-08 1949-04-05 0 Details
US2464269A Method and means for controlling the polarization of radian… Expired / Lapsed 1942-06-12 1949-03-15 0 Details
US2463577A Gaseous discharge device Expired / Lapsed 1947-01-24 1949-03-08 0 Details
US2462841A Frequency-stabilizing system Expired / Lapsed 1946-03-18 1949-03-01 0 Details
US2462893A Modulator Expired / Lapsed 1946-03-07 1949-03-01 0 Details
US2455952A Magnetron Expired / Lapsed 1945-01-09 1948-12-14 0 Details
US2445774A Picture receiver utilizing anomalous reflection from silver Expired / Lapsed 1945-08-20 1948-07-27 0 Details
US2443706A Electrical socket Expired / Lapsed 1945-02-28 1948-06-22 0 Details
US2441822A Condenser charging and discharging system Expired / Lapsed 1945-11-06 1948-05-18 0 Details
US2440247A Welding system Expired / Lapsed 1942-01-23 1948-04-27 0 Details
US2439786A Electron discharge device Expired / Lapsed 1944-11-07 1948-04-20 0 Details
US2439401A Magnetron oscillator of the resonant cavity type Expired / Lapsed 1942-09-10 1948-04-13 0 Details
US2436794A Method and apparatus for charging an electrical condenser Expired / Lapsed 1945-08-02 1948-03-02 0 Details
US2433837A Gyro-controlled stabilizing system Expired / Lapsed 1944-01-03 1948-01-06 0 Details
US2428048A Electron discharge device Expired / Lapsed 1945-09-15 1947-09-30 0 Details
US2415116A Electrical system Expired / Lapsed 1944-11-30 1947-02-04 0 Details
US2413385A Electron discharge device of the magnetron type Expired / Lapsed 1945-03-23 1946-12-31 0 Details
US2411155A Television receiving system Expired / Lapsed 1944-09-14 1946-11-19 0 Details
US2408239A Electronic discharge device Expired / Lapsed 1943-07-14 1946-09-24 0 Details
US2408237A Tunable magnetron Expired / Lapsed 1942-03-06 1946-09-24 0 Details
US2402983A Electronic discharge tube Expired / Lapsed 1941-11-26 1946-07-02 0 Details
US2395881A Controlled peaking trasformer Expired / Lapsed 1940-08-02 1946-03-05 0 Details
US2386820A Method of forming seals Expired / Lapsed 1941-12-22 1945-10-16 0 Details
US2383492A Voltage regulator Expired / Lapsed 1942-10-10 1945-08-28 0 Details
US2379462A Ignition tube timing arrangement Expired / Lapsed 1941-07-30 1945-07-03 0 Details
US2375830A Device for producing successive electrical impulses Expired / Lapsed 1942-03-31 1945-05-15 0 Details
US2356765A Welding system Expired / Lapsed 1942-10-23 1944-08-29 0 Details
US2355083A Electrode assembly for discharge tubes Expired / Lapsed 1941-01-03 1944-08-08 0 Details
US2353733A Welding system Expired / Lapsed 1943-07-03 1944-07-18 0 Details
US2347715A Arc starting device Expired / Lapsed 1940-07-27 1944-05-02 0 Details
US2341562A Electrical control system Expired / Lapsed 1942-03-24 1944-02-15 0 Details
US2338118A Inverter Expired / Lapsed 1940-08-06 1944-01-04 0 Details
US2320916A Controlled ingition discharge tube system Expired / Lapsed 1942-06-19 1943-06-01 0 Details
US2319215A Condenser welding system Expired / Lapsed 1941-08-15 1943-05-18 0 Details
US2294388A Resistance welding system Expired / Lapsed 1940-01-02 1942-09-01 0 Details
US2270601A Arc tube system Expired / Lapsed 1939-05-04 1942-01-20 0 Details
US2269460A Condenser welding system Expired / Lapsed 1940-02-05 1942-01-13 0 Details
US2250102A Condenser charging system Expired / Lapsed 1940-07-18 1941-07-22 0 Details
US2233416A Inverter Expired / Lapsed 1940-01-09 1941-03-04 0 Details
US2197398A Electrical gaseous discharge device Expired / Lapsed 1936-11-04 1940-04-16 0 Details
US2092891A Voltage regulators connected in parallel Expired / Lapsed 1935-01-29 1937-09-14 0 Details
US2091693A Temperature-indicating device Expired / Lapsed 1936-04-22 1937-08-31 0 Details
US1991775A Variable color luminous device Expired / Lapsed 1932-01-08 1935-02-19 0 Details
US1985634A Regulating system Expired / Lapsed 1928-04-04 1934-12-25 0 Details
US1933396A Gaseous conduction apparatus Expired / Lapsed 1928-10-29 1933-10-31 0 Details
US1908316A Rectifying apparatus Expired / Lapsed 1926-10-01 1933-05-09 0 Details
US1863702A Gaseous conduction method and apparatus Expired / Lapsed 1926-04-12 1932-06-21 0 Details
US1816619A Gaseous conduction device Expired / Lapsed 1925-12-21 1931-07-28 0 Details
US1714406A Method and apparatus for causing electrical conduction Expired / Lapsed 1923-07-30 1929-05-21 0 Details
US1679448A Electrical-current modification Expired / Lapsed 1923-05-22 1928-08-07 0 Details