Philco Radio and Television Corp
Philco RadActive Patents
0
Total Holdings
52
Patent Holdings
Filter in Explorer →| Patent No. | Title | Status | Filing Date | Grant Date | Claims | Actions |
|---|---|---|---|---|---|---|
| GB485989A | Improvements in signal generating circuits | Expired / Lapsed | 1936-11-23 | — | 0 | Details |
| US2405277A | Tuning apparatus | Expired / Lapsed | 1943-12-02 | 1946-08-06 | 0 | Details |
| US2398050A | Vacuum tube system | Expired / Lapsed | 1945-02-02 | 1946-04-09 | 0 | Details |
| US2397306A | Portable radio receiver | Expired / Lapsed | 1943-02-11 | 1946-03-26 | 0 | Details |
| US2393238A | Refrigerator | Expired / Lapsed | 1944-02-26 | 1946-01-22 | 0 | Details |
| US2392727A | Refrigerator assembly | Expired / Lapsed | 1944-01-12 | 1946-01-08 | 0 | Details |
| US2388567A | Portable radio receiver | Expired / Lapsed | 1943-01-28 | 1945-11-06 | 0 | Details |
| US2378875A | Cathode ray television tube | Expired / Lapsed | 1942-03-30 | 1945-06-19 | 0 | Details |
| US2373660A | Antenna | Expired / Lapsed | 1942-03-25 | 1945-04-17 | 0 | Details |
| US2374071A | Amplifier circuits | Expired / Lapsed | 1936-12-19 | 1945-04-17 | 0 | Details |
| US2357237A | Remote control system for radio receivers and the like | Expired / Lapsed | 1938-07-20 | 1944-08-29 | 0 | Details |
| US2356140A | Automatic gain control and amplitude selection device | Expired / Lapsed | 1942-07-31 | 1944-08-22 | 0 | Details |
| US2354959A | Amplitude- and frequency-modulation radio receiver | Expired / Lapsed | 1941-11-14 | 1944-08-01 | 0 | Details |
| US2348660A | Phonograph | Expired / Lapsed | 1940-12-19 | 1944-05-09 | 0 | Details |
| US2340806A | Sound recording apparatus | Expired / Lapsed | 1941-12-04 | 1944-02-01 | 0 | Details |
| US2338399A | Means for reducing disturbances in concentric lines | Expired / Lapsed | 1942-02-03 | 1944-01-04 | 0 | Details |
| US2335205A | Supporting means for radio coil units and the like | Expired / Lapsed | 1941-10-16 | 1943-11-23 | 0 | Details |
| US2332540A | Method and apparatus for receiving frequency modulated waves | Expired / Lapsed | 1941-02-27 | 1943-10-26 | 0 | Details |
| US2330902A | Detector and automatic volume control circuit for frequency… | Expired / Lapsed | 1941-10-17 | 1943-10-05 | 0 | Details |
| US2322621A | Electroacoustic transducer | Expired / Lapsed | 1941-10-02 | 1943-06-22 | 0 | Details |
| US2316113A | Photoelectric phonograph | Expired / Lapsed | 1940-10-19 | 1943-04-06 | 0 | Details |
| US2312181A | Multiple tube socket structure | Expired / Lapsed | 1941-11-13 | 1943-02-23 | 0 | Details |
| US2294341A | Synchronizing circuit and the like | Expired / Lapsed | 1940-05-31 | 1942-08-25 | 0 | Details |
| US2290084A | Degenerative feedback circuit | Expired / Lapsed | 1937-07-24 | 1942-07-14 | 0 | Details |
| US2288554A | Synchronizing system and method | Expired / Lapsed | 1940-05-24 | 1942-06-30 | 0 | Details |
| US2281395A | Noise limiting circuits | Expired / Lapsed | 1939-07-27 | 1942-04-28 | 0 | Details |
| US2280670A | Cathode ray tube circuit | Expired / Lapsed | 1940-03-21 | 1942-04-21 | 0 | Details |
| US2277000A | Synchronizing system | Expired / Lapsed | 1940-09-17 | 1942-03-17 | 0 | Details |
| US2273934A | Noise limiting device | Expired / Lapsed | 1939-04-22 | 1942-02-24 | 0 | Details |
| US2273978A | Control circuit for gas triodes | Expired / Lapsed | 1939-03-31 | 1942-02-24 | 0 | Details |
| US2274586A | Cathode ray tube | Expired / Lapsed | 1939-02-25 | 1942-02-24 | 0 | Details |
| US2274564A | Step by step positioning device | Expired / Lapsed | 1938-07-20 | 1942-02-24 | 0 | Details |
| US2265883A | Signal amplitude limiting circuit | Expired / Lapsed | 1938-07-16 | 1941-12-09 | 0 | Details |
| US2252613A | Signal transmission system | Expired / Lapsed | 1939-07-05 | 1941-08-12 | 0 | Details |
| US2251851A | Electron-beam deflecting circuit | Expired / Lapsed | 1939-06-16 | 1941-08-05 | 0 | Details |
| US2250371A | Wireless remote control system for radio-phonograph combina… | Expired / Lapsed | 1940-01-03 | 1941-07-22 | 0 | Details |
| US2242983A | Photoelectric phonograph | Expired / Lapsed | 1940-12-13 | 1941-05-20 | 0 | Details |
| US2240606A | Electron beam deflecting yoke | Expired / Lapsed | 1939-10-21 | 1941-05-06 | 0 | Details |
| US2240600A | Automatic gain control system | Expired / Lapsed | 1938-07-16 | 1941-05-06 | 0 | Details |
| US2240420A | Electrical system | Expired / Lapsed | 1939-05-11 | 1941-04-29 | 0 | Details |
| US2240422A | Synchronizing circuit | Expired / Lapsed | 1939-05-04 | 1941-04-29 | 0 | Details |
| US2240428A | Electrical circuits | Expired / Lapsed | 1936-07-31 | 1941-04-29 | 0 | Details |
| US2236705A | Composite signal device | Expired / Lapsed | 1935-06-17 | 1941-04-01 | 0 | Details |
| US2233317A | Amplifier for television system | Expired / Lapsed | 1937-05-25 | 1941-02-25 | 0 | Details |
| US2231792A | Synchronizing system and method | Expired / Lapsed | 1938-08-12 | 1941-02-11 | 0 | Details |
| US2230926A | Timing signal circuits | Expired / Lapsed | 1939-04-13 | 1941-02-04 | 0 | Details |
| US2230923A | Device for supporting radio coils and the like | Expired / Lapsed | 1937-05-25 | 1941-02-04 | 0 | Details |
| US2226459A | Signal-deriving circuit | Expired / Lapsed | 1939-07-05 | 1940-12-24 | 0 | Details |
| US2224794A | Signal amplitude limiting circuits | Expired / Lapsed | 1939-05-13 | 1940-12-10 | 0 | Details |
| US2171536A | Electrical system | Expired / Lapsed | 1935-11-23 | 1939-09-05 | 0 | Details |
| US2151829A | Valve amplifying circuit | Expired / Lapsed | 1937-07-24 | 1939-03-28 | 0 | Details |
| US2141343A | Electrical system | Expired / Lapsed | 1935-06-07 | 1938-12-27 | 0 | Details |