Allen B du Mont Laboratories Inc
Allen B duActive Patents
0
Total Holdings
45
Patent Holdings
Filter in Explorer →| Patent No. | Title | Status | Filing Date | Grant Date | Claims | Actions |
|---|---|---|---|---|---|---|
| US2933729A | Calibrator circuit | Expired / Lapsed | 1956-06-15 | 1960-04-19 | 0 | Details |
| US2906962A | Sweep generator | Expired / Lapsed | 1957-02-27 | 1959-09-29 | 0 | Details |
| US2874315A | Switching device | Expired / Lapsed | 1958-06-26 | 1959-02-17 | 0 | Details |
| US2853550A | Synchronizing circuit | Expired / Lapsed | 1953-03-10 | 1958-09-23 | 0 | Details |
| US2838601A | Optical system | Expired / Lapsed | 1955-10-25 | 1958-06-10 | 0 | Details |
| US2826717A | Sensitivity adjusting circuit | Expired / Lapsed | 1950-09-23 | 1958-03-11 | 0 | Details |
| US2819380A | Method and apparatus for making apertured masks | Expired / Lapsed | 1953-03-23 | 1958-01-07 | 0 | Details |
| US2753763A | Electron optical filter | Expired / Lapsed | 1952-12-31 | 1956-07-10 | 0 | Details |
| US2737628A | Mixed highs filter circuit | Expired / Lapsed | 1951-07-27 | 1956-03-06 | 0 | Details |
| US2719956A | Electrical connector | Expired / Lapsed | 1950-10-23 | 1955-10-04 | 0 | Details |
| US2708240A | Sweep circuit | Expired / Lapsed | 1952-04-26 | 1955-05-10 | 0 | Details |
| US2702158A | Electronic computer | Expired / Lapsed | 1950-04-14 | 1955-02-15 | 0 | Details |
| US2688075A | Sawtooth wave generator | Expired / Lapsed | 1949-10-15 | 1954-08-31 | 0 | Details |
| US2670770A | Screw holding and feeding means for power-operated screw dr… | Expired / Lapsed | 1950-07-27 | 1954-03-02 | 0 | Details |
| US2661421A | Sweep generator protection circuit | Expired / Lapsed | 1950-06-28 | 1953-12-01 | 0 | Details |
| US2589386A | Pickup device for color television | Expired / Lapsed | 1947-12-02 | 1952-03-18 | 0 | Details |
| US2546338A | Circuit for minimizing transients during switching between … | Expired / Lapsed | 1947-05-13 | 1951-03-27 | 0 | Details |
| US2530431A | Color device for utilizing control signals | Expired / Lapsed | 1946-01-03 | 1950-11-21 | 0 | Details |
| US2510714A | Mixing circuit for television cameras | Expired / Lapsed | 1946-02-09 | 1950-06-06 | 0 | Details |
| US2490812A | Control for color television | Expired / Lapsed | 1946-01-03 | 1949-12-13 | 0 | Details |
| US2483452A | Color sorting device using differently color-selective phot… | Expired / Lapsed | 1946-11-19 | 1949-10-04 | 0 | Details |
| US2455992A | Cathode-ray tube amusement device | Expired / Lapsed | 1947-01-25 | 1948-12-14 | 0 | Details |
| US2451590A | Process of forming a luminescent screen | Expired / Lapsed | 1945-07-06 | 1948-10-19 | 0 | Details |
| US2448762A | Process and apparatus for monitoring synchronizing generato… | Expired / Lapsed | 1945-02-13 | 1948-09-07 | 0 | Details |
| US2448814A | Device for selecting metal pieces | Expired / Lapsed | 1944-07-12 | 1948-09-07 | 0 | Details |
| US2445933A | Controlled blocking tube oscillator | Expired / Lapsed | 1945-01-23 | 1948-07-27 | 0 | Details |
| US2445964A | Cathode-ray power indicator | Expired / Lapsed | 1944-09-15 | 1948-07-27 | 0 | Details |
| US2444560A | Cathode-ray tube spectrograph | Expired / Lapsed | 1944-04-15 | 1948-07-06 | 0 | Details |
| US2442138A | Stabilized modulated oscillator | Expired / Lapsed | 1944-08-05 | 1948-05-25 | 0 | Details |
| US2437173A | Device for discriminating between fixed and moving objects | Expired / Lapsed | 1945-07-27 | 1948-03-02 | 0 | Details |
| US2436265A | Cathode-ray tube | Expired / Lapsed | 1945-07-27 | 1948-02-17 | 0 | Details |
| US2389025A | Synchronizer for oscillators | Expired / Lapsed | 1942-01-10 | 1945-11-13 | 0 | Details |
| US2384931A | Synchronizing generator | Expired / Lapsed | 1942-01-14 | 1945-09-18 | 0 | Details |
| US2373114A | Television film recording and projection | Expired / Lapsed | 1941-06-21 | 1945-04-10 | 0 | Details |
| US2356733A | Electronic voltmeter and ohmmeter | Expired / Lapsed | 1943-04-24 | 1944-08-29 | 0 | Details |
| US2355363A | Cathode-ray ignition analyzer | Expired / Lapsed | 1942-09-29 | 1944-08-08 | 0 | Details |
| US2343630A | Shield for cathode ray tubes | Expired / Lapsed | 1942-04-25 | 1944-03-07 | 0 | Details |
| US2338646A | Shading generator | Expired / Lapsed | 1942-01-13 | 1944-01-04 | 0 | Details |
| US2337980A | System for color television receivers | Expired / Lapsed | 1941-04-26 | 1943-12-28 | 0 | Details |
| US2297742A | Blocking tube oscillator for television | Expired / Lapsed | 1941-07-15 | 1942-10-06 | 0 | Details |
| US2297752A | Monitoring and control system | Expired / Lapsed | 1940-08-03 | 1942-10-06 | 0 | Details |
| US2245409A | Method and system for television communication | Expired / Lapsed | 1939-08-02 | 1941-06-10 | 0 | Details |
| US2221398A | Amplifier | Expired / Lapsed | 1939-09-08 | 1940-11-12 | 0 | Details |
| US2208254A | Amplifier | Expired / Lapsed | 1939-09-27 | 1940-07-16 | 0 | Details |
| US2157749A | Method and system for television communication | Expired / Lapsed | 1938-01-11 | 1939-05-09 | 0 | Details |