General Precision Laboratory Inc
General PrActive Patents
0
Total Holdings
73
Patent Holdings
Filter in Explorer →| Patent No. | Title | Status | Filing Date | Grant Date | Claims | Actions |
|---|---|---|---|---|---|---|
| US2922224A | Navigation system employing star heading reference | Expired / Lapsed | 1955-01-24 | 1960-01-26 | 0 | Details |
| US2920316A | Weighing encoder | Expired / Lapsed | 1955-03-11 | 1960-01-05 | 0 | Details |
| US2911597A | Modulation system | Expired / Lapsed | 1957-10-07 | 1959-11-03 | 0 | Details |
| US2908902A | World-wide navigational system | Expired / Lapsed | 1954-02-17 | 1959-10-13 | 0 | Details |
| US2903522A | Transistor amplifier | Expired / Lapsed | 1955-07-07 | 1959-09-08 | 0 | Details |
| US2896162A | Heterodyne autocorrelator | Expired / Lapsed | 1953-10-30 | 1959-07-21 | 0 | Details |
| US2889470A | Inverter | Expired / Lapsed | 1958-06-25 | 1959-06-02 | 0 | Details |
| US2885471A | Automatic iris control | Expired / Lapsed | 1955-07-14 | 1959-05-05 | 0 | Details |
| US2885547A | Pulse train genera tor with variable pulse length | Expired / Lapsed | 1953-06-16 | 1959-05-05 | 0 | Details |
| US2884545A | Transistor protection circuit | Expired / Lapsed | 1954-03-17 | 1959-04-28 | 0 | Details |
| US2874382A | Dual beam antenna | Expired / Lapsed | 1954-06-09 | 1959-02-17 | 0 | Details |
| US2870429A | Automatic program control system | Expired / Lapsed | 1951-03-27 | 1959-01-20 | 0 | Details |
| US2869118A | Navigation system | Expired / Lapsed | 1947-05-20 | 1959-01-13 | 0 | Details |
| US2846583A | Voltage controlled multivibrator oscillator | Expired / Lapsed | 1956-12-18 | 1958-08-05 | 0 | Details |
| US2820855A | High impedance transistor amplifier | Expired / Lapsed | 1955-07-07 | 1958-01-21 | 0 | Details |
| US2819352A | Transistor magnetic amplifier circuit | Expired / Lapsed | 1954-01-29 | 1958-01-07 | 0 | Details |
| US2806198A | Load sharing circuit | Expired / Lapsed | 1953-01-28 | 1957-09-10 | 0 | Details |
| US2787188A | Optical cross-correlator | Expired / Lapsed | 1953-07-31 | 1957-04-02 | 0 | Details |
| US2781168A | Great circle computer | Expired / Lapsed | 1955-09-15 | 1957-02-12 | 0 | Details |
| US2769957A | Comparator | Expired / Lapsed | 1953-07-31 | 1956-11-06 | 0 | Details |
| US2769145A | Microwave power divider | Expired / Lapsed | 1951-08-10 | 1956-10-30 | 0 | Details |
| US2761332A | Differential gear | Expired / Lapsed | 1953-08-11 | 1956-09-04 | 0 | Details |
| US2757366A | Closed path delay line | Expired / Lapsed | 1953-04-16 | 1956-07-31 | 0 | Details |
| US2757234A | Television shutter | Expired / Lapsed | 1950-03-29 | 1956-07-31 | 0 | Details |
| US2753524A | Wave analyzer | Expired / Lapsed | 1953-01-22 | 1956-07-03 | 0 | Details |
| US2753498A | Cyclic function modifying circuit | Expired / Lapsed | 1952-12-31 | 1956-07-03 | 0 | Details |
| US2750584A | Analog to digital converter | Expired / Lapsed | 1954-03-29 | 1956-06-12 | 0 | Details |
| US2748384A | Automatic frequency control circuit | Expired / Lapsed | 1953-04-02 | 1956-05-29 | 0 | Details |
| US2744339A | Radar simulator | Expired / Lapsed | 1952-07-24 | 1956-05-08 | 0 | Details |
| US2744683A | Navigational resolver-integrator | Expired / Lapsed | 1949-12-16 | 1956-05-08 | 0 | Details |
| US2738504A | Digital number converter | Expired / Lapsed | 1951-08-18 | 1956-03-13 | 0 | Details |
| US2737586A | Pulsed microwave generator with automatic current control | Expired / Lapsed | 1952-07-24 | 1956-03-06 | 0 | Details |
| US2714136A | Stabilized direct-coupled amplifier | Expired / Lapsed | 1951-02-27 | 1955-07-26 | 0 | Details |
| US2714131A | Television recording apparatus | Expired / Lapsed | 1948-10-12 | 1955-07-26 | 0 | Details |
| US2704307A | Television synchronization and phase lock circuit | Expired / Lapsed | 1953-01-21 | 1955-03-15 | 0 | Details |
| US2696557A | Self-monitoring trigger generator | Expired / Lapsed | 1949-11-16 | 1954-12-07 | 0 | Details |
| US2695988A | Mixer-modulator | Expired / Lapsed | 1953-10-30 | 1954-11-30 | 0 | Details |
| US2685065A | Microwave power divider | Expired / Lapsed | 1949-02-17 | 1954-07-27 | 0 | Details |
| US2680231A | Tone control | Expired / Lapsed | 1950-01-07 | 1954-06-01 | 0 | Details |
| US2679621A | Saturable transformer amplifier | Expired / Lapsed | 1952-08-06 | 1954-05-25 | 0 | Details |
| US2674812A | Pattern target display | Expired / Lapsed | 1950-04-05 | 1954-04-13 | 0 | Details |
| US2669121A | Supersonic flow meter | Expired / Lapsed | 1948-12-02 | 1954-02-16 | 0 | Details |
| US2664465A | Television recorder | Expired / Lapsed | 1950-04-18 | 1953-12-29 | 0 | Details |
| US2644930A | Microwave polarization rotating device and coupling network | Expired / Lapsed | 1949-03-24 | 1953-07-07 | 0 | Details |
| US2639386A | Noise compressor | Expired / Lapsed | 1950-08-30 | 1953-05-19 | 0 | Details |
| US2638507A | Magnetic record eraser | Expired / Lapsed | 1950-08-24 | 1953-05-12 | 0 | Details |
| US2634721A | Pressure transducer | Expired / Lapsed | 1951-05-19 | 1953-04-14 | 0 | Details |
| US2622231A | Integrator | Expired / Lapsed | 1948-09-28 | 1952-12-16 | 0 | Details |
| US2617586A | Computer | Expired / Lapsed | 1949-10-28 | 1952-11-11 | 0 | Details |
| US2613629A | Full-view concentric indicator | Expired / Lapsed | 1950-08-30 | 1952-10-14 | 0 | Details |
| US2610789A | Triangle solver | Expired / Lapsed | 1948-01-21 | 1952-09-16 | 0 | Details |
| US2605335A | Light amplifier | Expired / Lapsed | 1949-05-25 | 1952-07-29 | 0 | Details |
| US2604535A | Synchronizing and phasing system for television recorders | Expired / Lapsed | 1948-12-01 | 1952-07-22 | 0 | Details |
| US2600868A | Color television recording apparatus | Expired / Lapsed | 1950-06-29 | 1952-06-17 | 0 | Details |
| US2584866A | Frequency measuring device | Expired / Lapsed | 1949-10-28 | 1952-02-05 | 0 | Details |
| US2584267A | Automatic plotting board and projecting means | Expired / Lapsed | 1949-02-17 | 1952-02-05 | 0 | Details |
| US2569240A | Line brightness equalization circuit | Expired / Lapsed | 1950-07-20 | 1951-09-25 | 0 | Details |
| US2569164A | Variable sweep circuit | Expired / Lapsed | 1949-09-23 | 1951-09-25 | 0 | Details |
| US2565366A | Synchronizing and phasing system for television recorders | Expired / Lapsed | 1949-12-08 | 1951-08-21 | 0 | Details |
| US2561182A | Sharp frequency discriminator | Expired / Lapsed | 1948-05-26 | 1951-07-17 | 0 | Details |
| US2560165A | Carbon arc feed | Expired / Lapsed | 1950-10-26 | 1951-07-10 | 0 | Details |
| US2559499A | Electronic switch circuit | Expired / Lapsed | 1949-10-21 | 1951-07-03 | 0 | Details |
| US2559513A | Servo system with saturable core component | Expired / Lapsed | 1948-12-28 | 1951-07-03 | 0 | Details |
| US2555442A | Radar trainer | Expired / Lapsed | 1949-08-06 | 1951-06-05 | 0 | Details |
| US2551964A | Variable capacity integrator | Expired / Lapsed | 1950-01-13 | 1951-05-08 | 0 | Details |
| US2540943A | Visual signal translator | Expired / Lapsed | 1950-01-10 | 1951-02-06 | 0 | Details |
| US2529459A | Low-frequency power amplifier | Expired / Lapsed | 1948-11-02 | 1950-11-07 | 0 | Details |
| US2525891A | Television recording or transmitting apparatus using consta… | Expired / Lapsed | 1947-07-17 | 1950-10-17 | 0 | Details |
| US2497513A | Radio navigation system | Expired / Lapsed | 1948-06-10 | 1950-02-14 | 0 | Details |
| US2493669A | Modulator | Expired / Lapsed | 1948-11-03 | 1950-01-03 | 0 | Details |
| US2473334A | Potentiometric circuit | Expired / Lapsed | 1948-08-27 | 1949-06-14 | 0 | Details |
| US2466984A | Motor control circuit | Expired / Lapsed | 1947-09-09 | 1949-04-12 | 0 | Details |
| US2460638A | Servo follow-up control | Expired / Lapsed | 1946-11-13 | 1949-02-01 | 0 | Details |