Sperry Gyroscope Co Inc
Sperry GyrActive Patents
0
Total Holdings
226
Patent Holdings
Filter in Explorer →| Patent No. | Title | Status | Filing Date | Grant Date | Claims | Actions |
|---|---|---|---|---|---|---|
| GB656889A | Improvements in or relating to control systems for gyro ver… | Expired / Lapsed | 1948-01-30 | — | 0 | Details |
| GB654658A | Improvements in or relating to gyroscopic apparatus for use… | Expired / Lapsed | 1947-07-25 | — | 0 | Details |
| GB640562A | Improvements in or relating to control pendulums particular… | Expired / Lapsed | 1946-08-01 | — | 0 | Details |
| GB526658A | Improvements in or relating to apparatus for indicating the… | Expired / Lapsed | 1939-03-24 | — | 0 | Details |
| US2434897A | Stereoscopic radio location device | Expired / Lapsed | 1943-10-08 | 1948-01-27 | 0 | Details |
| US2434294A | Frequency control system | Expired / Lapsed | 1943-10-22 | 1948-01-13 | 0 | Details |
| US2434293A | Frequency control of an oscillator of the velocity modulati… | Expired / Lapsed | 1943-05-11 | 1948-01-13 | 0 | Details |
| US2433868A | Radar test apparatus | Expired / Lapsed | 1943-08-18 | 1948-01-06 | 0 | Details |
| US2433843A | Fixed gun interaircraft fire control system | Expired / Lapsed | 1942-10-17 | 1948-01-06 | 0 | Details |
| US2433368A | Wave guide construction | Expired / Lapsed | 1942-03-31 | 1947-12-30 | 0 | Details |
| US2432502A | Hydraulic control system | Expired / Lapsed | 1939-03-01 | 1947-12-16 | 0 | Details |
| US2429642A | Craft control apparatus | Expired / Lapsed | 1945-10-26 | 1947-10-28 | 0 | Details |
| US2429595A | Automatic landing system | Expired / Lapsed | 1943-09-03 | 1947-10-28 | 0 | Details |
| US2429636A | Phase responsive apparatus | Expired / Lapsed | 1943-05-25 | 1947-10-28 | 0 | Details |
| US2429640A | Directive antenna | Expired / Lapsed | 1942-10-17 | 1947-10-28 | 0 | Details |
| US2428351A | Radio wave reflectivity indicating system | Expired / Lapsed | 1943-01-22 | 1947-10-07 | 0 | Details |
| US2427366A | Phase control apparatus | Expired / Lapsed | 1944-09-08 | 1947-09-16 | 0 | Details |
| US2426992A | Glide path transmitter | Expired / Lapsed | 1942-05-27 | 1947-09-09 | 0 | Details |
| US2426654A | Remote indicator for radio pulse systems | Expired / Lapsed | 1943-05-25 | 1947-09-02 | 0 | Details |
| US2426256A | Sweep circuit | Expired / Lapsed | 1944-07-08 | 1947-08-26 | 0 | Details |
| US2425834A | Coaxial line coupling | Expired / Lapsed | 1943-03-31 | 1947-08-19 | 0 | Details |
| US2425330A | Cathode-ray system with bright and dark marker indications | Expired / Lapsed | 1943-06-22 | 1947-08-12 | 0 | Details |
| US2425013A | Frequency control system | Expired / Lapsed | 1944-04-07 | 1947-08-05 | 0 | Details |
| US2425009A | Phase-sensitive detector | Expired / Lapsed | 1943-06-29 | 1947-08-05 | 0 | Details |
| US2424562A | Gyro flux valve compass system | Expired / Lapsed | 1944-03-31 | 1947-07-29 | 0 | Details |
| US2424570A | Cross pointer meter | Expired / Lapsed | 1943-05-26 | 1947-07-29 | 0 | Details |
| US2424569A | Electric motor follow-up system | Expired / Lapsed | 1941-03-06 | 1947-07-29 | 0 | Details |
| US2424568A | Self-synchronous positional control system | Expired / Lapsed | 1939-11-17 | 1947-07-29 | 0 | Details |
| US2424263A | Radio system for distance and velocity measurement | Expired / Lapsed | 1943-02-23 | 1947-07-22 | 0 | Details |
| US2423337A | Radio controlled pilot system | Expired / Lapsed | 1942-05-25 | 1947-07-01 | 0 | Details |
| US2423336A | Radio controlled pilot system | Expired / Lapsed | 1941-02-10 | 1947-07-01 | 0 | Details |
| US2422687A | Gyrocompass amplifier circuit | Expired / Lapsed | 1943-02-03 | 1947-06-24 | 0 | Details |
| US2419979A | Transformer pickoff | Expired / Lapsed | 1943-07-17 | 1947-05-06 | 0 | Details |
| US2419970A | Navigation system | Expired / Lapsed | 1943-05-29 | 1947-05-06 | 0 | Details |
| US2419613A | Tuned microwave wattmeter | Expired / Lapsed | 1943-12-13 | 1947-04-29 | 0 | Details |
| US2419219A | Phase responsive circuits | Expired / Lapsed | 1943-05-25 | 1947-04-22 | 0 | Details |
| US2419239A | Fire control system | Expired / Lapsed | 1943-01-08 | 1947-04-22 | 0 | Details |
| US2417820A | Power-measuring bridge | Expired / Lapsed | 1943-11-03 | 1947-03-25 | 0 | Details |
| US2417821A | Automatic pilot for dirigible craft | Expired / Lapsed | 1943-04-26 | 1947-03-25 | 0 | Details |
| US2417086A | Homing system | Expired / Lapsed | 1943-12-31 | 1947-03-11 | 0 | Details |
| US2416790A | Transmission line bridge circuit | Expired / Lapsed | 1941-01-28 | 1947-03-04 | 0 | Details |
| US2415807A | Directive electromagnetic radiator | Expired / Lapsed | 1942-01-29 | 1947-02-18 | 0 | Details |
| US2415430A | Automatic pilot with automatic banking | Expired / Lapsed | 1942-07-28 | 1947-02-11 | 0 | Details |
| US2415429A | Aircraft altitude control | Expired / Lapsed | 1942-02-13 | 1947-02-11 | 0 | Details |
| US2415080A | Antihunt electrical control system | Expired / Lapsed | 1942-09-03 | 1947-02-04 | 0 | Details |
| US2415092A | Altitude control for aircraft | Expired / Lapsed | 1942-02-06 | 1947-02-04 | 0 | Details |
| US2414791A | Instrument landing system | Expired / Lapsed | 1941-10-23 | 1947-01-28 | 0 | Details |
| US2414448A | Gyro magnetic compass system | Expired / Lapsed | 1941-11-06 | 1947-01-21 | 0 | Details |
| US2414107A | Electronic timing apparatus | Expired / Lapsed | 1944-06-30 | 1947-01-14 | 0 | Details |
| US2414102A | Handle control system | Expired / Lapsed | 1941-07-23 | 1947-01-14 | 0 | Details |
| US2414103A | Apparatus for controlling missiles in flight | Expired / Lapsed | 1941-07-08 | 1947-01-14 | 0 | Details |
| US2414430A | Electrically controlled servo system | Expired / Lapsed | 1937-06-17 | 1947-01-14 | 0 | Details |
| US2412204A | Torque exerting means | Expired / Lapsed | 1942-04-10 | 1946-12-10 | 0 | Details |
| US2411861A | Electrical connector | Expired / Lapsed | 1943-03-19 | 1946-12-03 | 0 | Details |
| US2410827A | Scanning device | Expired / Lapsed | 1943-06-28 | 1946-11-12 | 0 | Details |
| US2410831A | Scanning device | Expired / Lapsed | 1942-04-10 | 1946-11-12 | 0 | Details |
| US2410058A | Automatic climb and glide control for aircraft | Expired / Lapsed | 1939-04-25 | 1946-10-29 | 0 | Details |
| US2409648A | Bomb sight | Expired / Lapsed | 1941-01-25 | 1946-10-22 | 0 | Details |
| US2409178A | Mounting means for gyroscopes | Expired / Lapsed | 1943-06-30 | 1946-10-15 | 0 | Details |
| US2409190A | Remote control system | Expired / Lapsed | 1941-09-20 | 1946-10-15 | 0 | Details |
| US2408817A | Electron discharge apparatus | Expired / Lapsed | 1943-11-29 | 1946-10-08 | 0 | Details |
| US2408813A | Apparatus for electrical control | Expired / Lapsed | 1936-09-09 | 1946-10-08 | 0 | Details |
| US2408420A | Frequency multiplier | Expired / Lapsed | 1944-01-13 | 1946-10-01 | 0 | Details |
| US2408425A | Instrument landing system | Expired / Lapsed | 1941-04-04 | 1946-10-01 | 0 | Details |
| US2408115A | Stereoscopic viewer | Expired / Lapsed | 1943-03-25 | 1946-09-24 | 0 | Details |
| US2408069A | Gun positioning system | Expired / Lapsed | 1942-05-01 | 1946-09-24 | 0 | Details |
| US2407652A | Detonation responsive means for controlling internal-combus… | Expired / Lapsed | 1944-02-28 | 1946-09-17 | 0 | Details |
| US2407657A | Transformer pick-off | Expired / Lapsed | 1942-10-24 | 1946-09-17 | 0 | Details |
| US2407275A | Radio scanning apparatus | Expired / Lapsed | 1944-07-29 | 1946-09-10 | 0 | Details |
| US2407267A | Ultra high frequency attenuator | Expired / Lapsed | 1943-03-05 | 1946-09-10 | 0 | Details |
| US2407310A | Scanning device | Expired / Lapsed | 1943-02-27 | 1946-09-10 | 0 | Details |
| US2407305A | Scanning device | Expired / Lapsed | 1942-04-10 | 1946-09-10 | 0 | Details |
| US2407190A | Filter for fluid flow systems | Expired / Lapsed | 1944-06-30 | 1946-09-03 | 0 | Details |
| US2406858A | Visual position and phase sense indicator | Expired / Lapsed | 1943-04-15 | 1946-09-03 | 0 | Details |
| US2406341A | Directional gyroscope | Expired / Lapsed | 1942-02-20 | 1946-08-27 | 0 | Details |
| US2406405A | Coaxial condenser crystal and method of making same | Expired / Lapsed | 1941-05-19 | 1946-08-27 | 0 | Details |
| US2406372A | High-frequency apparatus | Expired / Lapsed | 1941-05-17 | 1946-08-27 | 0 | Details |
| US2405568A | Indicating apparatus | Expired / Lapsed | 1944-04-29 | 1946-08-13 | 0 | Details |
| US2404011A | Prediction apparatus | Expired / Lapsed | 1943-06-21 | 1946-07-16 | 0 | Details |
| US2401337A | Controlling means for gyro instruments | Expired / Lapsed | 1942-08-15 | 1946-06-04 | 0 | Details |
| US2400126A | Pneumatically controlled automatic pilot | Expired / Lapsed | 1941-09-05 | 1946-05-14 | 0 | Details |
| US2399674A | Alternating current power bridge | Expired / Lapsed | 1943-11-11 | 1946-05-07 | 0 | Details |
| US2398916A | Electronic voltage regulator | Expired / Lapsed | 1945-03-22 | 1946-04-23 | 0 | Details |
| US2398421A | Electrohydraulic control system | Expired / Lapsed | 1939-07-15 | 1946-04-16 | 0 | Details |
| US2397961A | Detector | Expired / Lapsed | 1943-02-01 | 1946-04-09 | 0 | Details |
| US2397532A | Range finder | Expired / Lapsed | 1943-04-02 | 1946-04-02 | 0 | Details |
| US2397557A | Limit stop | Expired / Lapsed | 1942-12-26 | 1946-04-02 | 0 | Details |
| US2396701A | Computing aircraft gun sight | Expired / Lapsed | 1940-09-26 | 1946-03-19 | 0 | Details |
| US2395854A | Flight path controller | Expired / Lapsed | 1943-11-08 | 1946-03-05 | 0 | Details |
| US2393624A | Navigation system | Expired / Lapsed | 1943-09-01 | 1946-01-29 | 0 | Details |
| US2392370A | Electric discharge means for controlling position | Expired / Lapsed | 1942-11-10 | 1946-01-08 | 0 | Details |
| US2391442A | Gyro magnetic compass | Expired / Lapsed | 1942-03-21 | 1945-12-25 | 0 | Details |
| US2390563A | Electrical time delay line | Expired / Lapsed | 1941-10-14 | 1945-12-11 | 0 | Details |
| US2389146A | Flux valve | Expired / Lapsed | 1943-01-19 | 1945-11-20 | 0 | Details |
| US2389143A | Sextant | Expired / Lapsed | 1942-06-11 | 1945-11-20 | 0 | Details |
| US2387783A | Transmission line | Expired / Lapsed | 1943-02-01 | 1945-10-30 | 0 | Details |
| US2387313A | Switch electrolyte | Expired / Lapsed | 1944-02-07 | 1945-10-23 | 0 | Details |
| US2384838A | Gyro instrument | Expired / Lapsed | 1943-03-25 | 1945-09-18 | 0 | Details |
| US2382993A | Erection device for gyro verticals | Expired / Lapsed | 1944-02-14 | 1945-08-21 | 0 | Details |
| US2380932A | Gyro magnetic compass | Expired / Lapsed | 1942-11-11 | 1945-08-07 | 0 | Details |
| US2380425A | Aircraft automatic pilot with automatic banking | Expired / Lapsed | 1938-05-10 | 1945-07-31 | 0 | Details |
| US2378910A | Antiaircraft fire control predictor | Expired / Lapsed | 1937-10-05 | 1945-06-26 | 0 | Details |
| US2377898A | Converting device | Expired / Lapsed | 1941-12-12 | 1945-06-12 | 0 | Details |
| US2377902A | Direction finder | Expired / Lapsed | 1941-10-07 | 1945-06-12 | 0 | Details |
| US2376392A | Phase shifter | Expired / Lapsed | 1943-02-23 | 1945-05-22 | 0 | Details |
| US2373145A | Delayed trigger circuit | Expired / Lapsed | 1943-03-30 | 1945-04-10 | 0 | Details |
| US2373144A | Automatic steering device | Expired / Lapsed | 1941-10-14 | 1945-04-10 | 0 | Details |
| US2373315A | Automatic pilot for aircraft | Expired / Lapsed | 1940-05-22 | 1945-04-10 | 0 | Details |
| US2372185A | Drift compensator for aircraft | Expired / Lapsed | 1938-10-27 | 1945-03-27 | 0 | Details |
| US2371606A | Bomb sight | Expired / Lapsed | 1937-02-26 | 1945-03-20 | 0 | Details |
| US2368628A | Object controlling means | Expired / Lapsed | 1942-10-27 | 1945-02-06 | 0 | Details |
| US2368644A | Commutator and brush type switch | Expired / Lapsed | 1942-10-24 | 1945-02-06 | 0 | Details |
| US2363500A | Gyro magnetic compass system | Expired / Lapsed | 1941-11-06 | 1944-11-28 | 0 | Details |
| US2361956A | Automatic position indicating system | Expired / Lapsed | 1938-12-09 | 1944-11-07 | 0 | Details |
| US2360851A | Rotating field excited flux valve | Expired / Lapsed | 1943-01-28 | 1944-10-24 | 0 | Details |
| US2360191A | Directional gyroscope | Expired / Lapsed | 1942-09-12 | 1944-10-10 | 0 | Details |
| US2358803A | Temperature compensated barometric controller | Expired / Lapsed | 1940-10-30 | 1944-09-26 | 0 | Details |
| US2349261A | Phase angle indicator | Expired / Lapsed | 1942-02-13 | 1944-05-23 | 0 | Details |
| US2346693A | Directional apparatus | Expired / Lapsed | 1942-11-05 | 1944-04-18 | 0 | Details |
| US2345642A | High frequency tube structure | Expired / Lapsed | 1941-04-24 | 1944-04-04 | 0 | Details |
| US2340865A | Antiaircraft fire control director | Expired / Lapsed | 1937-10-19 | 1944-02-08 | 0 | Details |
| US2332523A | Ground track tracer and landing recorder | Expired / Lapsed | 1941-07-15 | 1943-10-26 | 0 | Details |
| US2332994A | Acceleration measuring device | Expired / Lapsed | 1940-09-25 | 1943-10-26 | 0 | Details |
| US2311652A | Gyroscopic horizon | Expired / Lapsed | 1940-03-20 | 1943-02-23 | 0 | Details |
| US2309853A | Rate and attitude indicating instrument | Expired / Lapsed | 1941-04-10 | 1943-02-02 | 0 | Details |
| US2307023A | Method and apparatus for landing aircraft | Expired / Lapsed | 1940-08-28 | 1943-01-05 | 0 | Details |
| US2298608A | Memory type recorder | Expired / Lapsed | 1939-11-07 | 1942-10-13 | 0 | Details |
| US2293039A | Artificial horizon for ships | Expired / Lapsed | 1940-06-05 | 1942-08-18 | 0 | Details |
| US2293092A | Correction device for gyroscopes | Expired / Lapsed | 1938-08-04 | 1942-08-18 | 0 | Details |
| US2293293A | Air pick-off for sensitive instruments | Expired / Lapsed | 1938-06-01 | 1942-08-18 | 0 | Details |
| US2292732A | Universal indicator for aircraft | Expired / Lapsed | 1939-10-26 | 1942-08-11 | 0 | Details |
| US2291612A | Turn indicator | Expired / Lapsed | 1940-04-19 | 1942-08-04 | 0 | Details |
| US2291045A | Synchronizing arrangement for detonation detectors | Expired / Lapsed | 1939-06-01 | 1942-07-28 | 0 | Details |
| US2287002A | Antihunt position control system | Expired / Lapsed | 1939-12-20 | 1942-06-16 | 0 | Details |
| US2283754A | Automatic banking means for airplane gyro pilots | Expired / Lapsed | 1939-04-08 | 1942-05-19 | 0 | Details |
| US2283525A | Salinity indicator and alarm | Expired / Lapsed | 1939-01-20 | 1942-05-19 | 0 | Details |
| US2281286A | Correction device for gyroscopic compasses and the like | Expired / Lapsed | 1939-10-19 | 1942-04-28 | 0 | Details |
| US2280116A | Automatic means for caging gyroscopes | Expired / Lapsed | 1939-03-03 | 1942-04-21 | 0 | Details |
| US2275712A | Pressure diaphragm | Expired / Lapsed | 1939-04-22 | 1942-03-10 | 0 | Details |
| US2270875A | Gyro vertical and automatic pilot for aircraft | Expired / Lapsed | 1939-03-18 | 1942-01-27 | 0 | Details |
| US2262245A | Cathode ray flight indicator | Expired / Lapsed | 1938-07-28 | 1941-11-11 | 0 | Details |
| US2262033A | Aircraft flight indicator and control system therefor | Expired / Lapsed | 1936-09-17 | 1941-11-11 | 0 | Details |
| US2257757A | Radio compass navigation apparatus | Expired / Lapsed | 1937-10-22 | 1941-10-07 | 0 | Details |
| US2256482A | Data transmission and control system | Expired / Lapsed | 1936-06-06 | 1941-09-23 | 0 | Details |
| US2249744A | Gyro vertical | Expired / Lapsed | 1938-03-05 | 1941-07-22 | 0 | Details |
| US2242253A | Deviometer | Expired / Lapsed | 1938-01-13 | 1941-05-20 | 0 | Details |
| US2238300A | Airplane automatic pilot with automatic banking | Expired / Lapsed | 1938-05-14 | 1941-04-15 | 0 | Details |
| US2235826A | Antiaircraft fire control system | Expired / Lapsed | 1936-02-21 | 1941-03-25 | 0 | Details |
| US2233415A | Position control system | Expired / Lapsed | 1937-06-17 | 1941-03-04 | 0 | Details |
| US2231929A | Tridimensional radio direction indicator | Expired / Lapsed | 1937-04-29 | 1941-02-18 | 0 | Details |
| US2227598A | Radio absolute altimeter | Expired / Lapsed | 1937-07-03 | 1941-01-07 | 0 | Details |
| US2227375A | Servomotor system for aircraft | Expired / Lapsed | 1938-11-26 | 1940-12-31 | 0 | Details |
| US2225046A | Radio contourmeter | Expired / Lapsed | 1938-05-03 | 1940-12-17 | 0 | Details |
| US2210916A | Automatic pilot for dirigible craft | Expired / Lapsed | 1938-04-05 | 1940-08-13 | 0 | Details |
| US2207709A | Radio drift course finder | Expired / Lapsed | 1935-12-13 | 1940-07-16 | 0 | Details |
| US2206875A | Fire control device | Expired / Lapsed | 1936-04-21 | 1940-07-09 | 0 | Details |
| US2203671A | Airplane automatic pilot | Expired / Lapsed | 1938-02-26 | 1940-06-11 | 0 | Details |
| US2203478A | Data transmission and control system | Expired / Lapsed | 1936-04-21 | 1940-06-04 | 0 | Details |
| US2202142A | Instrument dial illumination | Expired / Lapsed | 1937-03-27 | 1940-05-28 | 0 | Details |
| US2201174A | Automatic steering system for aircraft | Expired / Lapsed | 1938-07-02 | 1940-05-21 | 0 | Details |
| US2199024A | Temperature compensation for gyroscopes | Expired / Lapsed | 1939-01-27 | 1940-04-30 | 0 | Details |
| US2177094A | Gyro sextant | Expired / Lapsed | 1936-12-11 | 1939-10-24 | 0 | Details |
| US2176197A | Earth inductor compass | Expired / Lapsed | 1937-05-18 | 1939-10-17 | 0 | Details |
| US2174777A | Directional gyroscope | Expired / Lapsed | 1934-02-28 | 1939-10-03 | 0 | Details |
| US2162699A | Bomb sight | Expired / Lapsed | 1936-02-20 | 1939-06-20 | 0 | Details |
| US2159481A | Sound locator receiver | Expired / Lapsed | 1936-02-28 | 1939-05-23 | 0 | Details |
| US2155421A | Safety device for hydraulic servomotors | Expired / Lapsed | 1937-12-09 | 1939-04-25 | 0 | Details |
| US2155401A | Rate control course changing means for automatic pilots | Expired / Lapsed | 1937-07-10 | 1939-04-25 | 0 | Details |
| US2150015A | Salinity indicator system | Expired / Lapsed | 1935-04-23 | 1939-03-07 | 0 | Details |
| US2144616A | Remote control means for airplane automatic pilots | Expired / Lapsed | 1936-05-09 | 1939-01-24 | 0 | Details |
| US2143140A | Altitude control for aircraft | Expired / Lapsed | 1937-03-04 | 1939-01-10 | 0 | Details |
| US2141056A | Positional control system | Expired / Lapsed | 1936-03-19 | 1938-12-20 | 0 | Details |
| US2139490A | Remote control system | Expired / Lapsed | 1935-10-31 | 1938-12-06 | 0 | Details |
| US2139558A | Follow-up system for gyro compasses | Expired / Lapsed | 1935-08-29 | 1938-12-06 | 0 | Details |
| US2131993A | Sonic depth and height indicator | Expired / Lapsed | 1932-03-17 | 1938-10-04 | 0 | Details |
| US2131471A | Illuminator for indicator dials | Expired / Lapsed | 1936-04-29 | 1938-09-27 | 0 | Details |
| US2126887A | Positional control system | Expired / Lapsed | 1935-07-05 | 1938-08-16 | 0 | Details |
| US2126910A | Electrical control system | Expired / Lapsed | 1935-06-20 | 1938-08-16 | 0 | Details |
| US2115086A | Nonhunting or dead beat remote control | Expired / Lapsed | 1933-09-23 | 1938-04-26 | 0 | Details |
| US2104144A | Airplane door construction | Expired / Lapsed | 1935-09-26 | 1938-01-04 | 0 | Details |
| US2093503A | Artificial horizon | Expired / Lapsed | 1931-09-11 | 1937-09-21 | 0 | Details |
| US2091306A | Level flight control for automatic pilots | Expired / Lapsed | 1936-06-12 | 1937-08-31 | 0 | Details |
| US2091300A | Flight level control for automatic pilots | Expired / Lapsed | 1933-07-21 | 1937-08-31 | 0 | Details |
| US2088654A | Position control system | Expired / Lapsed | 1935-02-16 | 1937-08-03 | 0 | Details |
| US2069417A | Fire control system | Expired / Lapsed | 1934-01-10 | 1937-02-02 | 0 | Details |
| US2068490A | Position control system | Expired / Lapsed | 1935-04-05 | 1937-01-19 | 0 | Details |
| US2066194A | Automatic spiraling device for aircraft | Expired / Lapsed | 1934-04-27 | 1936-12-29 | 0 | Details |
| US2065303A | Apparatus for the control of gunfire | Expired / Lapsed | 1933-01-28 | 1936-12-22 | 0 | Details |
| US2045579A | Automatic level control for aircraft | Expired / Lapsed | 1935-04-09 | 1936-06-30 | 0 | Details |
| US2045775A | Hand electric steering device for ships | Expired / Lapsed | 1934-08-24 | 1936-06-30 | 0 | Details |
| US2040014A | Antihunting positional control | Expired / Lapsed | 1934-07-03 | 1936-05-05 | 0 | Details |
| US2027808A | Artificial horizon for aircraft | Expired / Lapsed | 1932-11-12 | 1936-01-14 | 0 | Details |
| US2025054A | Course changing means for automatically steered ships | Expired / Lapsed | 1932-06-30 | 1935-12-24 | 0 | Details |
| US2015183A | Self-synchronous automatic pilot | Expired / Lapsed | 1931-10-27 | 1935-09-24 | 0 | Details |
| US2008364A | Remote control of heavy objects | Expired / Lapsed | 1933-09-12 | 1935-07-16 | 0 | Details |
| US2003661A | Searchlight director | Expired / Lapsed | 1932-05-16 | 1935-06-04 | 0 | Details |
| US1999646A | Light or ray controlled follow-up system | Expired / Lapsed | 1932-01-18 | 1935-04-30 | 0 | Details |
| US1998948A | Gyrocompass | Expired / Lapsed | 1932-11-10 | 1935-04-23 | 0 | Details |
| US1992970A | Hydropneumatic automatic pilot | Expired / Lapsed | 1932-09-02 | 1935-03-05 | 0 | Details |
| US1988521A | Gyro earth inductor compass | Expired / Lapsed | 1930-03-28 | 1935-01-22 | 0 | Details |
| US1984874A | Gyro vertical | Expired / Lapsed | 1930-06-26 | 1934-12-18 | 0 | Details |
| US1982636A | Air driven gyro vertical | Expired / Lapsed | 1931-02-10 | 1934-12-04 | 0 | Details |
| US1982635A | Air driven gyroscope | Expired / Lapsed | 1931-01-28 | 1934-12-04 | 0 | Details |
| US1982702A | Gyro pilot for aircraft | Expired / Lapsed | 1929-11-29 | 1934-12-04 | 0 | Details |
| US1976648A | Remote control system | Expired / Lapsed | 1930-11-11 | 1934-10-09 | 0 | Details |
| US1975180A | Course recorder | Expired / Lapsed | 1928-12-15 | 1934-10-02 | 0 | Details |
| US1959805A | Follow-up or remote control system | Expired / Lapsed | 1932-04-01 | 1934-05-22 | 0 | Details |
| US1959804A | Noncontacting follow-up system | Expired / Lapsed | 1929-07-27 | 1934-05-22 | 0 | Details |
| US1921983A | Follow-up device for gyro compasses | Expired / Lapsed | 1930-11-04 | 1933-08-08 | 0 | Details |
| US1916706A | Remote control system | Expired / Lapsed | 1930-10-08 | 1933-07-04 | 0 | Details |
| US1896805A | Directional radio steering device | Expired / Lapsed | 1930-02-20 | 1933-02-07 | 0 | Details |
| US1887318A | Follow-up system for gyrocompasses | Expired / Lapsed | 1929-01-03 | 1932-11-08 | 0 | Details |
| US1880982A | Mounting for compasses | Expired / Lapsed | 1930-05-12 | 1932-10-04 | 0 | Details |
| US1881011A | Synchronous transmission and torque-amplifying system | Expired / Lapsed | 1930-02-24 | 1932-10-04 | 0 | Details |
| US1850640A | Self synchronous transmission system | Expired / Lapsed | 1920-04-10 | 1932-03-22 | 0 | Details |
| US1838084A | Follow-up system | Expired / Lapsed | 1926-09-11 | 1931-12-29 | 0 | Details |
| US1830041A | Method and means for imparting intelligence | Expired / Lapsed | 1924-11-18 | 1931-11-03 | 0 | Details |
| US1817907A | Position comparator | Expired / Lapsed | 1926-04-13 | 1931-08-11 | 0 | Details |
| US1803834A | Power transmission | Expired / Lapsed | 1927-08-09 | 1931-05-05 | 0 | Details |
| US1797394A | Signal | Expired / Lapsed | 1925-07-18 | 1931-03-24 | 0 | Details |
| US1792937A | Wireless-controlled aerial torpedo | Expired / Lapsed | 1917-12-18 | 1931-02-17 | 0 | Details |
| US1785241A | Dead-reckoning tracer | Expired / Lapsed | 1925-03-17 | 1930-12-16 | 0 | Details |
| US1783769A | Bomb sight | Expired / Lapsed | 1926-06-01 | 1930-12-02 | 0 | Details |
| US1773411A | Gyroscopic compass | Expired / Lapsed | 1920-01-15 | 1930-08-19 | 0 | Details |
| US1715270A | Radio direction and position finder | Expired / Lapsed | 1923-02-19 | 1929-05-28 | 0 | Details |
| US1707690A | Automatic pilot for airplanes | Expired / Lapsed | 1919-09-13 | 1929-04-02 | 0 | Details |