RTX Corp
RTX CorpActive Patents
0
Total Holdings
308
Patent Holdings
Filter in Explorer →| Patent No. | Title | Status | Filing Date | Grant Date | Claims | Actions |
|---|---|---|---|---|---|---|
| CA2182374A1 | Variable referenced control system for remotely operated ve… | Expired / Lapsed | 1995-02-22 | — | 0 | Details |
| GB2010920A | High temperature aluminum bearing alloy coatings | Expired / Lapsed | 1978-12-01 | — | 0 | Details |
| DE2634887A1 | STEPPER MOTOR POSITION CONTROL CIRCUIT | Expired / Lapsed | 1976-08-03 | — | 0 | Details |
| GB1015312A | Magnetic encoder | Expired / Lapsed | 1963-03-05 | — | 0 | Details |
| US5575438A | Unmanned VTOL ground surveillance vehicle | Expired / Lapsed | 1994-05-09 | 1996-11-19 | 21 | Details |
| US5267832A | Flarable retainer | Expired / Lapsed | 1992-03-30 | 1993-12-07 | 16 | Details |
| US5165845A | Controlling stall margin in a gas turbine engine during acc… | Expired / Lapsed | 1991-11-08 | 1992-11-24 | 8 | Details |
| US5130084A | Powder forging of hollow articles | Expired / Lapsed | 1990-12-24 | 1992-07-14 | 14 | Details |
| US5015116A | Structural joints of high dimensional stability | Expired / Lapsed | 1990-02-26 | 1991-05-14 | 14 | Details |
| US4961626A | Direct incorporation of night vision in a helmet mounted di… | Expired / Lapsed | 1989-02-21 | 1990-10-09 | 49 | Details |
| US4850734A | Coupling device for a machine tool | Expired / Lapsed | 1988-12-23 | 1989-07-25 | 6 | Details |
| US4820097A | Fastener with airflow opening | Expired / Lapsed | 1988-03-18 | 1989-04-11 | 5 | Details |
| US4818102A | Active optical pyrometer | Expired / Lapsed | 1986-12-22 | 1989-04-04 | 8 | Details |
| US4722261A | Extendable ram cannon | Expired / Lapsed | 1986-09-22 | 1988-02-02 | 2 | Details |
| US4678328A | Non-optimum waveguide optical sensor | Expired / Lapsed | 1986-04-17 | 1987-07-07 | 8 | Details |
| US4669058A | Integral control of a dependent variable in a system having… | Expired / Lapsed | 1985-09-30 | 1987-05-26 | 6 | Details |
| US4652122A | Gust detection system | Expired / Lapsed | 1985-06-26 | 1987-03-24 | 7 | Details |
| US4645217A | Finger seal assembly | Expired / Lapsed | 1985-11-29 | 1987-02-24 | 7 | Details |
| US4604702A | Variable discriminators in electrostatic engine diagnostics | Expired / Lapsed | 1982-12-28 | 1986-08-05 | 5 | Details |
| US4583492A | High rate, low temperature silicon deposition system | Expired / Lapsed | 1983-12-19 | 1986-04-22 | 2 | Details |
| US4576547A | Active clearance control | Expired / Lapsed | 1983-11-03 | 1986-03-18 | 5 | Details |
| US4575802A | Robot/workpiece orientation | Expired / Lapsed | 1983-07-11 | 1986-03-11 | 2 | Details |
| US4535606A | High efficiency air cycle air conditioning system | Expired / Lapsed | 1983-12-09 | 1985-08-20 | 24 | Details |
| US4516853A | Laser radar adaptive tracking system | Expired / Lapsed | 1982-03-31 | 1985-05-14 | 6 | Details |
| US4481237A | Method of applying ceramic coatings on a metallic substrate | Expired / Lapsed | 1981-12-14 | 1984-11-06 | 7 | Details |
| US4472476A | Composite silicon carbide/silicon nitride coatings for carb… | Expired / Lapsed | 1982-06-24 | 1984-09-18 | 12 | Details |
| US4470116A | Digital flight data recording system | Expired / Lapsed | 1982-08-02 | 1984-09-04 | 8 | Details |
| US4428293A | Gun-launched variable thrust ramjet projectile | Expired / Lapsed | 1980-12-19 | 1984-01-31 | 7 | Details |
| US4426768A | Ultra-thin microelectronic pressure sensors | Expired / Lapsed | 1981-12-28 | 1984-01-24 | 4 | Details |
| US4425407A | CVD SiC pretreatment for carbon-carbon composites | Expired / Lapsed | 1982-06-24 | 1984-01-10 | 9 | Details |
| US4424004A | End cap for a rotor shaft of a rotary machine | Expired / Lapsed | 1981-11-09 | 1984-01-03 | 16 | Details |
| US4378626A | Cooled mirror construction by chemical vapor deposition | Expired / Lapsed | 1981-06-10 | 1983-04-05 | 5 | Details |
| US4321831A | Digitally compatible optical pressure measurement | Expired / Lapsed | 1980-09-26 | 1982-03-30 | 6 | Details |
| US4302970A | Optical temperature probe employing rare earth absorption | Expired / Lapsed | 1980-05-09 | 1981-12-01 | 8 | Details |
| US4280185A | Engine module life tracking system | Expired / Lapsed | 1979-08-06 | 1981-07-21 | 13 | Details |
| US4270168A | Selective disablement in fail-operational, fail-safe multi-… | Expired / Lapsed | 1978-08-31 | 1981-05-26 | 8 | Details |
| US4253153A | Energy conservative control of terminal reheat heating, ven… | Expired / Lapsed | 1979-06-28 | 1981-02-24 | 4 | Details |
| US4241398A | Computer network, line protocol system | Expired / Lapsed | 1978-09-29 | 1980-12-23 | 4 | Details |
| US4215408A | Temperature control of unoccupied living spaces | Expired / Lapsed | 1977-12-12 | 1980-07-29 | 18 | Details |
| US4214037A | Silicon nitride coated carbon fibers and composites | Expired / Lapsed | 1979-03-30 | 1980-07-22 | 6 | Details |
| US4205381A | Energy conservative control of heating, ventilating, and ai… | Expired / Lapsed | 1977-08-31 | 1980-05-27 | 8 | Details |
| US4187455A | Stepper motor feedback in position servo loop | Expired / Lapsed | 1975-08-04 | 1980-02-05 | 3 | Details |
| US4167388A | Apparatus for forming hollow members | Expired / Lapsed | 1978-05-01 | 1979-09-11 | 10 | Details |
| US4150076A | Fuel cell electrode and method of manufacture of sheet mate… | Expired / Lapsed | 1977-05-23 | 1979-04-17 | 8 | Details |
| US4147433A | Contour inspection | Expired / Lapsed | 1977-12-12 | 1979-04-03 | 12 | Details |
| US4122240A | Skin melting | Expired / Lapsed | 1977-03-02 | 1978-10-24 | 26 | Details |
| US4092515A | Laser method of precision hole drilling | Expired / Lapsed | 1977-04-07 | 1978-05-30 | 20 | Details |
| US4078864A | Method and apparatus for viewing and measuring damage in an… | Expired / Lapsed | 1976-07-08 | 1978-03-14 | 9 | Details |
| US4053254A | Turbine case cooling system | Expired / Lapsed | 1976-03-26 | 1977-10-11 | 8 | Details |
| US4029271A | Automatic approach to hover system | Expired / Lapsed | 1976-04-07 | 1977-06-14 | 22 | Details |
| US4020700A | Unitary fluidic angular rate sensor | Expired / Lapsed | 1976-02-25 | 1977-05-03 | 14 | Details |
| US4020699A | Temperature stabilized fluidic angular rate sensor | Expired / Lapsed | 1976-02-05 | 1977-05-03 | 3 | Details |
| US3987244A | Programmable image processor | Expired / Lapsed | 1975-12-31 | 1976-10-19 | 7 | Details |
| US3979227A | Method for catalyzing a fuel cell electrode and an electrod… | Expired / Lapsed | 1976-01-02 | 1976-09-07 | 5 | Details |
| US3916412A | Frequency stabilized single oscillator transceivers | Expired / Lapsed | 1974-08-29 | 1975-10-28 | 17 | Details |
| US3901784A | Cylindrical rf sputtering apparatus | Expired / Lapsed | 1974-06-19 | 1975-08-26 | 5 | Details |
| US3898388A | Phase inversion synchronization | Expired / Lapsed | 1974-06-21 | 1975-08-05 | 8 | Details |
| US3863158A | Synthetic phasor generator | Expired / Lapsed | 1973-06-04 | 1975-01-28 | 5 | Details |
| US3857636A | Measurement of phase profile across a high power laser beam | Expired / Lapsed | 1973-10-03 | 1974-12-31 | 11 | Details |
| US3851159A | Electronic waypoint bearing converter | Expired / Lapsed | 1973-08-02 | 1974-11-26 | 7 | Details |
| US3823358A | Battery peaking unit for fuel cell power plants | Expired / Lapsed | 1973-06-18 | 1974-07-09 | 6 | Details |
| US3821626A | Battery peaking unit for fuel cell power plants | Expired / Lapsed | 1973-06-18 | 1974-06-28 | 11 | Details |
| US3821005A | Densification of silicon nitride | Expired / Lapsed | 1973-05-18 | 1974-06-28 | 2 | Details |
| US3818430A | Traffic detector using balun transformer phase detector | Expired / Lapsed | 1973-04-30 | 1974-06-18 | 5 | Details |
| US3811940A | High frequency heating method for vapor deposition of coati… | Expired / Lapsed | 1972-02-10 | 1974-05-21 | 8 | Details |
| US3790278A | Peaked power coherent pulsed laser transmitter/receiver sys… | Expired / Lapsed | 1972-04-26 | 1974-02-05 | 2 | Details |
| US3780346A | Digital anti-spin and anti-slide system for moving vehicles | Expired / Lapsed | 1972-07-03 | 1973-12-18 | 8 | Details |
| US3776637A | Circular involute reflector for providing a variable pathle… | Expired / Lapsed | 1972-12-14 | 1973-12-04 | 8 | Details |
| US3758758A | Weighting rotational statistical vibration analysis employi… | Expired / Lapsed | 1972-03-10 | 1973-09-11 | 6 | Details |
| US3748194A | Processing for the high strength alpha beta titanium alloys | Expired / Lapsed | 1971-10-06 | 1973-07-24 | 0 | Details |
| US3745577A | Variable squint and beamwidth amplitude monopulse radar | Expired / Lapsed | 1972-03-29 | 1973-07-10 | 7 | Details |
| US3740752A | Mode interferometer squinting radar antenna | Expired / Lapsed | 1972-01-21 | 1973-06-19 | 12 | Details |
| US3731360A | Method of making a composite blade with an integrally attac… | Expired / Lapsed | 1971-04-07 | 1973-05-08 | 16 | Details |
| US3731991A | Reflecting means for beam control utilizing movable members… | Expired / Lapsed | 1969-03-03 | 1973-05-08 | 5 | Details |
| US3731070A | Gas turbine engine analyzer | Expired / Lapsed | 1971-04-27 | 1973-05-01 | 16 | Details |
| US3713135A | Digital symbol generator | Expired / Lapsed | 1971-05-24 | 1973-01-23 | 2 | Details |
| US3710271A | Fet driver for capacitive loads | Expired / Lapsed | 1971-10-12 | 1973-01-09 | 2 | Details |
| US3710175A | Twinkle effect display system in which information is modul… | Expired / Lapsed | 1969-06-20 | 1973-01-09 | 6 | Details |
| US3702989A | Selective data handling apparatus | Expired / Lapsed | 1971-03-12 | 1972-11-14 | 21 | Details |
| US3700307A | Adjustable nonlinearly transmissive optical device | Expired / Lapsed | 1971-04-05 | 1972-10-24 | 8 | Details |
| US3676085A | Cobalt base coating for the superalloys | Expired / Lapsed | 1971-02-18 | 1972-07-11 | 0 | Details |
| US3660140A | Treatment of carbon fibers | Expired / Lapsed | 1970-06-18 | 1972-05-02 | 7 | Details |
| US3660177A | Processing of nickel-base alloys for improved fatigue prope… | Expired / Lapsed | 1970-05-18 | 1972-05-02 | 10 | Details |
| US3640693A | Method of forming silicon compound fibers | Expired / Lapsed | 1969-02-03 | 1972-02-08 | 7 | Details |
| US3622908A | Dithered gain characteristic stabilization of a gas laser | Expired / Lapsed | 1970-03-20 | 1971-11-23 | 2 | Details |
| US3611181A | Laser diffraction grating coupling mirror | Expired / Lapsed | 1968-10-10 | 1971-10-05 | 1 | Details |
| US3602725A | Variable acoustic laser delay line | Expired / Lapsed | 1969-11-12 | 1971-08-31 | 7 | Details |
| US3602216A | Paste dispensing body electrode | Expired / Lapsed | 1969-09-16 | 1971-08-31 | 4 | Details |
| US3594130A | Blood oxygenator | Expired / Lapsed | 1969-03-24 | 1971-07-20 | 0 | Details |
| US3575054A | Pressure sensing device | Expired / Lapsed | 1969-03-12 | 1971-04-13 | 10 | Details |
| US3573123A | Composite high temperature resistant material and method of… | Expired / Lapsed | 1966-05-11 | 1971-03-30 | 0 | Details |
| US3571705A | Analog signal amplitude distribution measuring apparatus | Expired / Lapsed | 1968-12-09 | 1971-03-23 | 3 | Details |
| US3566860A | Carbon-impregnated body electrode | Expired / Lapsed | 1968-12-20 | 1971-03-02 | 0 | Details |
| US3566303A | Ultrasonic control system for lasers | Expired / Lapsed | 1967-06-15 | 1971-02-23 | 0 | Details |
| US3556744A | Composite metal article having nickel alloy having coats co… | Expired / Lapsed | 1965-08-16 | 1971-01-19 | 0 | Details |
| US3547522A | On-axis collimated viewing system | Expired / Lapsed | 1968-09-04 | 1970-12-15 | 0 | Details |
| US3548397A | Unit-distance encoder | Expired / Lapsed | 1967-07-27 | 1970-12-15 | 0 | Details |
| US3544916A | Multiple frequency ultrasonic control for lasers | Expired / Lapsed | 1968-04-16 | 1970-12-01 | 0 | Details |
| US3544806A | Continuously variable laser-acoustic delay line | Expired / Lapsed | 1968-03-04 | 1970-12-01 | 0 | Details |
| US3539928A | Operational multiplexer | Expired / Lapsed | 1968-11-13 | 1970-11-10 | 0 | Details |
| US3538498A | Majority data selecting and fault indicating | Expired / Lapsed | 1968-09-10 | 1970-11-03 | 0 | Details |
| US3521069A | Apparatus for obtaining a narrow high power laser pulse | Expired / Lapsed | 1967-09-29 | 1970-07-21 | 0 | Details |
| US3519923A | Capacitive transducer system independent of stray capacitan… | Expired / Lapsed | 1968-04-16 | 1970-07-07 | 0 | Details |
| US3516405A | Aspirator and control therefor | Expired / Lapsed | 1967-06-20 | 1970-06-23 | 0 | Details |
| US3517332A | Frequency modulation for lasers | Expired / Lapsed | 1966-11-16 | 1970-06-23 | 0 | Details |
| US3514776A | Mirror device | Expired / Lapsed | 1968-05-27 | 1970-05-26 | 0 | Details |
| US3514688A | Output-transformerless static inverter | Expired / Lapsed | 1968-03-28 | 1970-05-26 | 0 | Details |
| US3513845A | Bypass heart pump and oxygenator system | Expired / Lapsed | 1966-09-15 | 1970-05-26 | 0 | Details |
| US3511161A | Selecting the air source for an aircraft supercharger | Expired / Lapsed | 1968-11-15 | 1970-05-12 | 0 | Details |
| US3485559A | Angle measuring apparatus utilizing lasers | Expired / Lapsed | 1967-11-13 | 1969-12-23 | 0 | Details |
| US3481254A | Composite structure | Expired / Lapsed | 1967-08-14 | 1969-12-02 | 0 | Details |
| US3465103A | System for combining plural isolated physiological signals … | Expired / Lapsed | 1966-06-23 | 1969-09-02 | 0 | Details |
| US3451473A | Heat exchanger construction | Expired / Lapsed | 1967-04-11 | 1969-06-24 | 0 | Details |
| US3446916A | Collimated viewing system | Expired / Lapsed | 1964-07-29 | 1969-05-27 | 0 | Details |
| US3435372A | Ultrasonic modulator having a cylindrical transducer | Expired / Lapsed | 1966-01-19 | 1969-03-25 | 2 | Details |
| US3433983A | Electromagnetic actuator | Expired / Lapsed | 1966-11-14 | 1969-03-18 | 0 | Details |
| US3432587A | Process for preparing polytetrafluoroethylene gaskets | Expired / Lapsed | 1966-05-06 | 1969-03-11 | 0 | Details |
| US3428042A | Heart pump actuator | Expired / Lapsed | 1964-08-10 | 1969-02-18 | 0 | Details |
| US3427616A | Monopulse radar system of high resolution and accuracy | Expired / Lapsed | 1966-12-19 | 1969-02-11 | 0 | Details |
| US3426743A | Heart pump augmentation system | Expired / Lapsed | 1964-10-27 | 1969-02-11 | 0 | Details |
| US3426744A | Heart pump cannula | Expired / Lapsed | 1964-02-27 | 1969-02-11 | 0 | Details |
| US3426174A | Electron reflection seam tracker | Expired / Lapsed | 1965-12-09 | 1969-02-04 | 0 | Details |
| US3420170A | Single impression multicolor printing | Expired / Lapsed | 1966-10-11 | 1969-01-07 | 2 | Details |
| US3411495A | Bio-electrical sensor | Expired / Lapsed | 1965-12-14 | 1968-11-19 | 0 | Details |
| US3409469A | Vapor coating conductive filaments utilizing uniform temper… | Expired / Lapsed | 1964-03-05 | 1968-11-05 | 0 | Details |
| US3402278A | Electron beam cutting of printing plates | Expired / Lapsed | 1965-06-14 | 1968-09-17 | 0 | Details |
| US3399013A | Ultrasonic scanning cell | Expired / Lapsed | 1964-10-28 | 1968-08-27 | 0 | Details |
| US3391323A | High efficiency synthetic wave inverter | Expired / Lapsed | 1965-03-31 | 1968-07-02 | 0 | Details |
| US3389348A | Gating system for high power laser cascade | Expired / Lapsed | 1964-02-07 | 1968-06-18 | 0 | Details |
| US3381157A | Annular hollow cathode discharge apparatus | Expired / Lapsed | 1964-12-10 | 1968-04-30 | 2 | Details |
| US3376802A | Tracking loop for aircraft cabin pressure regulating system | Expired / Lapsed | 1966-07-08 | 1968-04-09 | 2 | Details |
| US3372973A | Two-dimensional beam scanning device | Expired / Lapsed | 1965-02-08 | 1968-03-12 | 0 | Details |
| US3369101A | Laser micro-processer | Expired / Lapsed | 1964-04-30 | 1968-02-13 | 0 | Details |
| US3362017A | Electron gun memory | Expired / Lapsed | 1962-09-04 | 1968-01-02 | 1 | Details |
| US3353539A | Electrical power generator employing a body fluid as electr… | Expired / Lapsed | 1963-10-31 | 1967-11-21 | 1 | Details |
| US3349314A | Inverter utilizing an auxiliary controlled rectifier for co… | Expired / Lapsed | 1965-09-14 | 1967-10-24 | 1 | Details |
| US3340601A | Alloy diffused transistor | Expired / Lapsed | 1963-07-17 | 1967-09-12 | 2 | Details |
| US3323017A | Overload protector for a source of electrical energy | Expired / Lapsed | 1964-01-28 | 1967-05-30 | 2 | Details |
| US3311844A | High repetition rate laser system | Expired / Lapsed | 1963-05-31 | 1967-03-28 | 2 | Details |
| US3297876A | Amplitude modulation for lasers | Expired / Lapsed | 1963-04-16 | 1967-01-10 | 2 | Details |
| US3272972A | Random orientation inertial system | Expired / Lapsed | 1962-01-15 | 1966-09-13 | 2 | Details |
| US3263323A | Fabrication of a continuous peripheral joint | Expired / Lapsed | 1965-10-21 | 1966-08-02 | 2 | Details |
| US3263153A | Inverter commutating capacitor charging system | Expired / Lapsed | 1962-10-30 | 1966-07-26 | 1 | Details |
| US3257555A | Pattern scanning system | Expired / Lapsed | 1963-10-14 | 1966-06-21 | 2 | Details |
| US3250901A | Time temperature recorder for turbojet engines | Expired / Lapsed | 1962-04-20 | 1966-05-10 | 2 | Details |
| US3244889A | Photosensitive tracker with special x and y axis photocells… | Expired / Lapsed | 1961-07-06 | 1966-04-05 | 0 | Details |
| US3212496A | Molecular physiological monitoring system | Expired / Lapsed | 1962-08-21 | 1965-10-19 | 2 | Details |
| US3206768A | Electromagnetic artificial heart having control means respo… | Expired / Lapsed | 1962-06-01 | 1965-09-21 | 2 | Details |
| US3208046A | Code generator | Expired / Lapsed | 1961-11-29 | 1965-09-21 | 2 | Details |
| US3206336A | Method of transforming n-type semiconductor material into p… | Expired / Lapsed | 1962-03-27 | 1965-09-14 | 2 | Details |
| US3199013A | Rate responsive compensation change circuit | Expired / Lapsed | 1963-05-31 | 1965-08-03 | 2 | Details |
| US3197856A | Explosively joining metals to form a continuous sheet | Expired / Lapsed | 1963-01-02 | 1965-08-03 | 2 | Details |
| US3197855A | Method of explosively forming a scarf type joint | Expired / Lapsed | 1962-12-28 | 1965-08-03 | 2 | Details |
| US3194487A | Noise abatement method and apparatus | Expired / Lapsed | 1963-06-04 | 1965-07-13 | 2 | Details |
| US3192371A | Feedback integrating system | Expired / Lapsed | 1961-09-14 | 1965-06-29 | 1 | Details |
| US3192318A | Method and apparatus for the machining of material by means… | Expired / Lapsed | 1960-09-06 | 1965-06-29 | 2 | Details |
| US3179868A | Apparatus for generating the locus of a nonlinear function | Expired / Lapsed | 1960-12-07 | 1965-04-20 | 1 | Details |
| US3172989A | Electron beam cutting control | Expired / Lapsed | 1962-07-27 | 1965-03-09 | 2 | Details |
| US3171953A | Counter | Expired / Lapsed | 1962-03-30 | 1965-03-02 | 2 | Details |
| US3167757A | Converter | Expired / Lapsed | 1960-10-24 | 1965-01-26 | 2 | Details |
| US3165619A | Operating control for electron beam machines | Expired / Lapsed | 1962-08-15 | 1965-01-12 | 1 | Details |
| US3155838A | Pulse-width modulator | Expired / Lapsed | 1960-05-20 | 1964-11-03 | 2 | Details |
| US3152261A | Variable reluctance hall effect resolver | Expired / Lapsed | 1961-04-12 | 1964-10-06 | 1 | Details |
| US3151231A | Method and apparatus for welding within an enclosure by mea… | Expired / Lapsed | 1961-01-24 | 1964-09-29 | 1 | Details |
| US3148265A | Means for focusing beams of charged particles | Expired / Lapsed | 1962-04-30 | 1964-09-08 | 2 | Details |
| US3146635A | Rotor balancing sleeve | Expired / Lapsed | 1961-05-22 | 1964-09-01 | 2 | Details |
| US3147449A | Pulse duration modulator | Expired / Lapsed | 1959-11-17 | 1964-09-01 | 1 | Details |
| US3141729A | Gels and method of making | Expired / Lapsed | 1960-07-11 | 1964-07-21 | 2 | Details |
| US3141101A | Brushless synchro construction | Expired / Lapsed | 1960-12-02 | 1964-07-14 | 2 | Details |
| US3141161A | Calibrated radar altitude control which compensates for cha… | Expired / Lapsed | 1959-05-11 | 1964-07-14 | 2 | Details |
| US3138800A | Phase detecting system | Expired / Lapsed | 1960-06-10 | 1964-06-23 | 0 | Details |
| US3135055A | Workpiece inspection system | Expired / Lapsed | 1960-10-19 | 1964-06-02 | 1 | Details |
| US3134892A | Method and apparatus for the machining of material by means… | Expired / Lapsed | 1961-08-01 | 1964-05-26 | 2 | Details |
| US3129409A | Magnetic tape to perforated tape digital information conver… | Expired / Lapsed | 1959-05-05 | 1964-04-14 | 2 | Details |
| US3121955A | Ultrasonic distance scaling apparatus | Expired / Lapsed | 1960-07-08 | 1964-02-25 | 1 | Details |
| US3112850A | Dicing of micro-semiconductors | Expired / Lapsed | 1962-10-31 | 1963-12-03 | 1 | Details |
| US3112791A | Air conditioning control | Expired / Lapsed | 1959-04-16 | 1963-12-03 | 2 | Details |
| US3111591A | Transistor step counter | Expired / Lapsed | 1959-10-08 | 1963-11-19 | 0 | Details |
| US3100879A | Capacitance sensing circuit | Expired / Lapsed | 1959-05-08 | 1963-08-13 | 0 | Details |
| US3086394A | Take-off monitor | Expired / Lapsed | 1959-01-12 | 1963-04-23 | 1 | Details |
| US3078778A | Flow control system for pressurized aircraft compartment | Expired / Lapsed | 1959-05-29 | 1963-02-26 | 1 | Details |
| US3070787A | Aligned brush analogue-to-digital converter | Expired / Lapsed | 1958-09-26 | 1962-12-25 | 0 | Details |
| US3056881A | Method of making electrical conductor device | Expired / Lapsed | 1961-06-07 | 1962-10-02 | 1 | Details |
| US3051942A | Synchronous positioning system | Expired / Lapsed | 1959-04-28 | 1962-08-28 | 0 | Details |
| US3046450A | Speed responsive fuel control for helicopters | Expired / Lapsed | 1959-07-09 | 1962-07-24 | 0 | Details |
| US3045983A | Ram air control for aircraft air conditioning system | Expired / Lapsed | 1958-05-15 | 1962-07-24 | 0 | Details |
| US3042872A | Transistor demodulator | Expired / Lapsed | 1959-03-04 | 1962-07-03 | 0 | Details |
| US3042371A | Variable camber balding | Expired / Lapsed | 1958-09-04 | 1962-07-03 | 0 | Details |
| US3036225A | Shiftable range mark generator for radarscope | Expired / Lapsed | 1958-12-23 | 1962-05-22 | 0 | Details |
| US3035477A | Apparatus for stabilizing optical sighting systems | Expired / Lapsed | 1950-02-01 | 1962-05-22 | 0 | Details |
| US3033459A | Decimal subtractor | Expired / Lapsed | 1960-10-18 | 1962-05-08 | 0 | Details |
| US3030770A | Variable supersonic inlet | Expired / Lapsed | 1957-07-30 | 1962-04-24 | 0 | Details |
| US3025418A | Quadrature stripping circuit | Expired / Lapsed | 1959-12-24 | 1962-03-13 | 0 | Details |
| US3024734A | Dynamic seal for varying operating conditions | Expired / Lapsed | 1959-06-16 | 1962-03-13 | 0 | Details |
| US3020527A | Position indicating system | Expired / Lapsed | 1957-05-13 | 1962-02-06 | 0 | Details |
| US3020533A | Cyclic analogue to digital converter | Expired / Lapsed | 1956-01-31 | 1962-02-06 | 0 | Details |
| US3019426A | Digital-to-analogue converter | Expired / Lapsed | 1957-11-29 | 1962-01-30 | 0 | Details |
| US3018395A | Tachometer generator | Expired / Lapsed | 1960-07-15 | 1962-01-23 | 0 | Details |
| US3016063A | Fluid valve | Expired / Lapsed | 1960-07-05 | 1962-01-09 | 0 | Details |
| US3014133A | Star tracker | Expired / Lapsed | 1958-06-23 | 1961-12-19 | 0 | Details |
| US2981609A | Etching bath for titanium and its alloys and process of etc… | Expired / Lapsed | 1956-11-20 | 1961-04-25 | 2 | Details |
| US2959002A | Turbine engine fuel control | Expired / Lapsed | 1957-10-23 | 1960-11-08 | 0 | Details |
| US2957488A | Pressure regulating system | Expired / Lapsed | 1956-09-21 | 1960-10-25 | 0 | Details |
| US2942119A | Photoelectric drift angle and ground speed meter | Expired / Lapsed | 1953-03-12 | 1960-06-21 | 0 | Details |
| US2939280A | Hydro-pneumatic fuel control for turbine power plants | Expired / Lapsed | 1955-02-24 | 1960-06-07 | 0 | Details |
| US2937532A | Digital gyroscope torquer | Expired / Lapsed | 1958-03-31 | 1960-05-24 | 0 | Details |
| US2938199A | Sequential pulse analogue to digital converter | Expired / Lapsed | 1957-07-24 | 1960-05-24 | 0 | Details |
| US2936974A | Fuel system responsive to angle of attack | Expired / Lapsed | 1954-11-09 | 1960-05-17 | 0 | Details |
| US2912010A | Frictionlessly mounted fluid poppet valve with balanced dyn… | Expired / Lapsed | 1957-06-04 | 1959-11-10 | 0 | Details |
| US2911606A | Pressure transducer | Expired / Lapsed | 1957-07-05 | 1959-11-03 | 0 | Details |
| US2911632A | Telemetric position transmitter | Expired / Lapsed | 1955-05-03 | 1959-11-03 | 0 | Details |
| US2898000A | O-ring pressure seal | Expired / Lapsed | 1957-01-30 | 1959-08-04 | 0 | Details |
| US2885614A | Servosystem angular motion transmitting apparatus | Expired / Lapsed | 1955-01-06 | 1959-05-05 | 0 | Details |
| US2873442A | Analogue to binary coded system converter | Expired / Lapsed | 1956-06-06 | 1959-02-10 | 0 | Details |
| US2873440A | Analogue-to-digital converter | Expired / Lapsed | 1954-10-26 | 1959-02-10 | 0 | Details |
| US2856754A | Fuel control including minimum fuel flow limiting for a spl… | Expired / Lapsed | 1956-11-01 | 1958-10-21 | 0 | Details |
| US2848626A | Infrared radiation detection system | Expired / Lapsed | 1955-09-02 | 1958-08-19 | 0 | Details |
| US2835340A | Moisture separator | Expired / Lapsed | 1955-02-17 | 1958-05-20 | 0 | Details |
| US2807138A | Fuel control for a split-turbine type of power plant | Expired / Lapsed | 1952-07-05 | 1957-09-24 | 0 | Details |
| US2782769A | Hydraulic servo system for fuel control | Expired / Lapsed | 1954-04-01 | 1957-02-26 | 0 | Details |
| US2772378A | Speed control circuits | Expired / Lapsed | 1951-12-11 | 1956-11-27 | 0 | Details |
| US2764867A | Safety circuit for thermocouple unit of the jet fuel control | Expired / Lapsed | 1952-12-06 | 1956-10-02 | 0 | Details |
| US2742224A | Compressor casing lining | Expired / Lapsed | 1951-03-30 | 1956-04-17 | 0 | Details |
| US2680001A | Arrangement for cooling turbine bearings | Expired / Lapsed | 1950-11-13 | 1954-06-01 | 0 | Details |
| US2677233A | Exhaust nozzle switch responsive to afterburner pressure ra… | Expired / Lapsed | 1949-06-30 | 1954-05-04 | 0 | Details |
| US2667150A | Control method and apparatus | Expired / Lapsed | 1947-05-21 | 1954-01-26 | 0 | Details |
| US2662020A | Refractory vitreous ceramic coating material | Expired / Lapsed | 1950-05-26 | 1953-12-08 | 2 | Details |
| US2660859A | Combined flameholder and turning vane | Expired / Lapsed | 1952-06-18 | 1953-12-01 | 0 | Details |
| US2653983A | Thermocouple unit | Expired / Lapsed | 1951-11-28 | 1953-09-29 | 0 | Details |
| US2650752A | Boundary layer control in blowers | Expired / Lapsed | 1949-08-27 | 1953-09-01 | 0 | Details |
| US2638293A | Restraining and releasing device for pilots | Expired / Lapsed | 1951-02-10 | 1953-05-12 | 0 | Details |
| US2632327A | Mass flow measuring device | Expired / Lapsed | 1950-08-17 | 1953-03-24 | 0 | Details |
| US2629936A | Method and apparatus to establish locating points on workpi… | Expired / Lapsed | 1947-09-19 | 1953-03-03 | 0 | Details |
| US2626968A | Expanded plastics | Expired / Lapsed | 1950-05-05 | 1953-01-27 | 2 | Details |
| US2625035A | Supersonic inspection device | Expired / Lapsed | 1945-12-22 | 1953-01-13 | 0 | Details |
| US2619157A | Antibuffet seat | Expired / Lapsed | 1948-01-30 | 1952-11-25 | 0 | Details |
| US2595942A | Accessory and counterbalance drive for power plants | Expired / Lapsed | 1948-06-17 | 1952-05-06 | 0 | Details |
| US2570434A | Canopy actuating mechanism | Expired / Lapsed | 1948-07-23 | 1951-10-09 | 0 | Details |
| US2560813A | Pressure fluid servomotor | Expired / Lapsed | 1948-06-17 | 1951-07-17 | 0 | Details |
| US2550002A | Laminated ski | Expired / Lapsed | 1947-07-29 | 1951-04-24 | 0 | Details |
| US2518697A | Helicopter with antitorque tail jet | Expired / Lapsed | 1944-10-30 | 1950-08-15 | 0 | Details |
| US2511858A | Method of making propeller blades | Expired / Lapsed | 1943-04-23 | 1950-06-20 | 0 | Details |
| US2509421A | Pressure measuring device | Expired / Lapsed | 1946-05-15 | 1950-05-30 | 0 | Details |
| US2505652A | Tail wheel actuated arresting hook | Expired / Lapsed | 1946-02-08 | 1950-04-25 | 0 | Details |
| US2496857A | Reduction gear unit | Expired / Lapsed | 1947-11-14 | 1950-02-07 | 0 | Details |
| US2496835A | Gas temperature probe of the thermocouple type | Expired / Lapsed | 1946-12-18 | 1950-02-07 | 0 | Details |
| US2494625A | Airfoil heating means | Expired / Lapsed | 1945-11-03 | 1950-01-17 | 0 | Details |
| US2489984A | Explosive-release mechanism | Expired / Lapsed | 1945-02-20 | 1949-11-29 | 0 | Details |
| US2484141A | Skin stressed laminated fiberglas rotor blade | Expired / Lapsed | 1947-01-09 | 1949-10-11 | 0 | Details |
| US2469458A | Blade form for supercharger impellers | Expired / Lapsed | 1945-09-24 | 1949-05-10 | 0 | Details |
| US2462953A | Adjustable cone orifice | Expired / Lapsed | 1946-02-05 | 1949-03-01 | 0 | Details |
| US2462931A | Pump for hydraulic pitch changing mechanisms | Expired / Lapsed | 1943-04-08 | 1949-03-01 | 0 | Details |
| US2456042A | Ignition timing | Expired / Lapsed | 1945-07-20 | 1948-12-14 | 0 | Details |
| US2444227A | Propeller drive | Expired / Lapsed | 1944-12-14 | 1948-06-29 | 0 | Details |
| US2444363A | Helical spline torque indicator | Expired / Lapsed | 1944-08-30 | 1948-06-29 | 0 | Details |
| US2443969A | Vibration pickup | Expired / Lapsed | 1946-03-12 | 1948-06-22 | 0 | Details |
| US2443192A | Automatic pilot for rotary wing aircraft | Expired / Lapsed | 1945-06-12 | 1948-06-15 | 0 | Details |
| US2439447A | Turbine bearing construction | Expired / Lapsed | 1944-01-28 | 1948-04-13 | 0 | Details |
| US2439131A | Resonance inspection method | Expired / Lapsed | 1943-11-20 | 1948-04-06 | 0 | Details |
| US2439130A | Surface and shear wave method and apparatus | Expired / Lapsed | 1943-11-20 | 1948-04-06 | 0 | Details |
| US2438867A | Method of assembling shrouds on impellers | Expired / Lapsed | 1945-06-01 | 1948-03-30 | 0 | Details |
| US2427588A | Apparatus for burning holes in metal | Expired / Lapsed | 1942-10-17 | 1947-09-16 | 0 | Details |
| US2426764A | Machine for finishing irregularly shaped articles | Expired / Lapsed | 1943-10-26 | 1947-09-02 | 0 | Details |
| US2425177A | Turbine construction | Expired / Lapsed | 1943-05-11 | 1947-08-05 | 0 | Details |
| US2421807A | Explosive-release mechanism | Expired / Lapsed | 1945-04-26 | 1947-06-10 | 0 | Details |
| US2421739A | Aircraft tail support and arresting member | Expired / Lapsed | 1942-02-11 | 1947-06-10 | 0 | Details |
| US2421501A | Fluid coupling outlet valve thermostatic control | Expired / Lapsed | 1943-08-28 | 1947-06-03 | 0 | Details |
| US2415104A | Turbine for aircraft | Expired / Lapsed | 1943-05-11 | 1947-02-04 | 0 | Details |
| US2411895A | Nozzle control | Expired / Lapsed | 1944-04-15 | 1946-12-03 | 0 | Details |
| US2402065A | Propeller control | Expired / Lapsed | 1942-11-05 | 1946-06-11 | 0 | Details |
| US2400415A | Automatic fuel control | Expired / Lapsed | 1941-10-22 | 1946-05-14 | 0 | Details |
| US2398701A | Supersonic inspection device | Expired / Lapsed | 1942-06-29 | 1946-04-16 | 0 | Details |
| US2391323A | Power plant control means | Expired / Lapsed | 1942-02-09 | 1945-12-18 | 0 | Details |
| US2390166A | Ignition timing | Expired / Lapsed | 1943-03-18 | 1945-11-27 | 0 | Details |
| US2390146A | Ignition timing control device | Expired / Lapsed | 1942-12-23 | 1945-11-27 | 0 | Details |
| US2372766A | Fuel proportioning device | Expired / Lapsed | 1942-04-21 | 1945-04-03 | 0 | Details |
| US2371872A | Aircraft power plant | Expired / Lapsed | 1939-08-19 | 1945-03-20 | 0 | Details |
| US2357625A | Engine testing apparatus | Expired / Lapsed | 1943-08-05 | 1944-09-05 | 0 | Details |
| US2352736A | Automatic resetting device for governors | Expired / Lapsed | 1940-10-02 | 1944-07-04 | 0 | Details |
| US2343382A | Propeller governor | Expired / Lapsed | 1939-08-02 | 1944-03-07 | 0 | Details |
| US2340133A | Propeller blade | Expired / Lapsed | 1940-12-14 | 1944-01-25 | 0 | Details |
| US2338293A | Method and apparatus for balancing propellers | Expired / Lapsed | 1941-09-27 | 1944-01-04 | 0 | Details |
| US2338483A | Propeller control | Expired / Lapsed | 1940-06-29 | 1944-01-04 | 0 | Details |
| US2336844A | Coordinate control | Expired / Lapsed | 1939-12-29 | 1943-12-14 | 0 | Details |
| US2333973A | Electric feathering control | Expired / Lapsed | 1939-11-16 | 1943-11-09 | 0 | Details |
| US2332452A | Propeller pitch changing mechanism | Expired / Lapsed | 1940-12-19 | 1943-10-19 | 0 | Details |
| US2330024A | Desludging mechanism | Expired / Lapsed | 1942-01-15 | 1943-09-21 | 0 | Details |
| US2322303A | Engine control means | Expired / Lapsed | 1938-03-01 | 1943-06-22 | 0 | Details |
| US2296288A | Controllable-pitch propeller | Expired / Lapsed | 1938-09-07 | 1942-09-22 | 0 | Details |
| US2280714A | Feathering propeller control | Expired / Lapsed | 1938-01-13 | 1942-04-21 | 0 | Details |
| US2276262A | Composite propeller | Expired / Lapsed | 1939-06-27 | 1942-03-10 | 0 | Details |
| US2269635A | Deicer fluid distributor | Expired / Lapsed | 1940-12-27 | 1942-01-13 | 0 | Details |
| US2264874A | Governor resetting device | Expired / Lapsed | 1940-08-31 | 1941-12-02 | 0 | Details |
| US2258462A | Electric synchronizer | Expired / Lapsed | 1938-02-26 | 1941-10-07 | 0 | Details |
| US2252464A | Stress measuring means | Expired / Lapsed | 1937-12-06 | 1941-08-12 | 0 | Details |
| US2248240A | Variable ratio gear | Expired / Lapsed | 1940-02-21 | 1941-07-08 | 0 | Details |
| US2248245A | Engine torque regulating device | Expired / Lapsed | 1939-11-16 | 1941-07-08 | 0 | Details |
| US2246745A | Propeller pitch control valve | Expired / Lapsed | 1939-05-18 | 1941-06-24 | 0 | Details |
| US2225892A | Engine mount locking means | Expired / Lapsed | 1940-01-04 | 1940-12-24 | 0 | Details |
| US2225856A | Heat exchanger | Expired / Lapsed | 1939-12-14 | 1940-12-24 | 0 | Details |
| US2199259A | Manifold pressure equalizer | Expired / Lapsed | 1937-09-18 | 1940-04-30 | 0 | Details |
| US2197179A | Two-speed supercharger | Expired / Lapsed | 1939-02-03 | 1940-04-16 | 0 | Details |
| US2155481A | Spark plug | Expired / Lapsed | 1938-04-01 | 1939-04-25 | 0 | Details |
| US2145460A | Method of forming bearings | Expired / Lapsed | 1936-11-28 | 1939-01-31 | 0 | Details |
| US2138969A | Oil pressure relief valve for internal combustion engines | Expired / Lapsed | 1936-05-26 | 1938-12-06 | 0 | Details |
| US2133656A | One-way drive for propellers | Expired / Lapsed | 1936-04-23 | 1938-10-18 | 0 | Details |
| US2132481A | Propeller drive for coaxial oppositely rotating propellers | Expired / Lapsed | 1936-04-25 | 1938-10-11 | 0 | Details |
| US2081762A | Automatic regulation for engine cooling means | Expired / Lapsed | 1936-09-22 | 1937-05-25 | 0 | Details |