GTE Sylvania Inc
GTE SylvanActive Patents
0
Total Holdings
109
Patent Holdings
Filter in Explorer →| Patent No. | Title | Status | Filing Date | Grant Date | Claims | Actions |
|---|---|---|---|---|---|---|
| US4145719A | Multi-channel video switch using dual-gate MOS-FETS | Expired / Lapsed | 1977-09-28 | 1979-03-20 | 2 | Details |
| US3943994A | Ceramic cellular structure having high cell density and met… | Expired / Lapsed | 1974-03-27 | 1976-03-16 | 6 | Details |
| US3922582A | Current limited oxcillator arrangement | Expired / Lapsed | 1974-08-22 | 1975-11-25 | 15 | Details |
| US3792284A | Electro-optic transmission link | Expired / Lapsed | 1972-10-13 | 1974-02-12 | 9 | Details |
| US3778811A | Display system with graphic fill-in | Expired / Lapsed | 1972-06-21 | 1973-12-11 | 13 | Details |
| US3765009A | Apparatus for displaying waveforms of time-varying signals … | Expired / Lapsed | 1972-03-01 | 1973-10-09 | 8 | Details |
| US3752139A | Electronic ignition timing system for internal combustion e… | Expired / Lapsed | 1971-11-23 | 1973-08-14 | 17 | Details |
| US3717813A | Amplifier station | Expired / Lapsed | 1971-04-01 | 1973-02-20 | 10 | Details |
| US3696369A | Signal processor | Expired / Lapsed | 1970-12-02 | 1972-10-03 | 31 | Details |
| US3662267A | System for locating and communicating with mobile units | Expired / Lapsed | 1970-05-20 | 1972-05-09 | 10 | Details |
| US3629622A | Switching regulator having a low dissipation current overlo… | Expired / Lapsed | 1970-04-03 | 1971-12-21 | 3 | Details |
| US3553433A | Data storage and transfer apparatus for plural-vehicle iden… | Expired / Lapsed | 1967-05-02 | 1971-01-05 | 13 | Details |
| US3530434A | Coded frequency vehicle identification system | Expired / Lapsed | 1967-06-14 | 1970-09-22 | 0 | Details |
| US3509347A | Optical superheterodyne system employing non-symmetrical wa… | Expired / Lapsed | 1967-08-07 | 1970-04-28 | 0 | Details |
| US3508215A | Magnetic thin film memory apparatus | Expired / Lapsed | 1966-11-25 | 1970-04-21 | 0 | Details |
| US3488436A | Intrusion detector control for closed circuit television sy… | Expired / Lapsed | 1966-09-29 | 1970-01-06 | 0 | Details |
| US3476947A | Optical intrusion detection system using dual beam peripher… | Expired / Lapsed | 1968-02-19 | 1969-11-04 | 0 | Details |
| US3456997A | Apparatus for eliminating image distortions | Expired / Lapsed | 1967-07-20 | 1969-07-22 | 0 | Details |
| US3435141A | Television camera synchronization control system | Expired / Lapsed | 1965-04-26 | 1969-03-25 | 0 | Details |
| US3434142A | Electronically controlled azimuth scanning antenna system | Expired / Lapsed | 1966-12-30 | 1969-03-18 | 0 | Details |
| US3417231A | Mark sensing system | Expired / Lapsed | 1964-07-30 | 1968-12-17 | 0 | Details |
| US3414731A | Package classification by tracking the path of a circular l… | Expired / Lapsed | 1966-10-28 | 1968-12-03 | 2 | Details |
| US3414768A | Semiconductor ballast for discharge lamp | Expired / Lapsed | 1966-01-03 | 1968-12-03 | 0 | Details |
| US3399012A | Optical transmission line for guiding an optical beam | Expired / Lapsed | 1964-01-31 | 1968-08-27 | 0 | Details |
| US3330959A | Fail-safe reflected light-responsive control circuit | Expired / Lapsed | 1964-05-27 | 1967-07-11 | 1 | Details |
| US3325632A | Data storage techniques | Expired / Lapsed | 1961-07-12 | 1967-06-13 | 2 | Details |
| US3309689A | Intrusion detection system | Expired / Lapsed | 1964-10-30 | 1967-03-14 | 2 | Details |
| US3309672A | Electronic computer interrupt system | Expired / Lapsed | 1963-01-04 | 1967-03-14 | 2 | Details |
| US3295110A | Associative memory of multi-plane common solenoid matrices | Expired / Lapsed | 1963-08-16 | 1966-12-27 | 2 | Details |
| US3284632A | Polarization modulation and demodulation | Expired / Lapsed | 1963-07-31 | 1966-11-08 | 2 | Details |
| US3263219A | Electronic data processing equipment | Expired / Lapsed | 1963-01-03 | 1966-07-26 | 2 | Details |
| US3235661A | Communications and data processing equipment | Expired / Lapsed | 1962-07-11 | 1966-02-15 | 2 | Details |
| US3229119A | Transistor logic circuits | Expired / Lapsed | 1963-05-17 | 1966-01-11 | 2 | Details |
| US3215987A | Electronic data processing | Expired / Lapsed | 1962-06-04 | 1965-11-02 | 2 | Details |
| US3212533A | Method of and apparatus for feeding articles | Expired / Lapsed | 1962-03-27 | 1965-10-19 | 2 | Details |
| US3210737A | Electronic data processing | Expired / Lapsed | 1962-01-29 | 1965-10-05 | 2 | Details |
| US3210733A | Data processing system | Expired / Lapsed | 1958-08-18 | 1965-10-05 | 2 | Details |
| US3189883A | Test and reset circuit for intrusion alarm system | Expired / Lapsed | 1961-12-18 | 1965-06-15 | 1 | Details |
| US3168697A | Method and apparatus for testing marginal failure of electr… | Expired / Lapsed | 1960-11-17 | 1965-02-02 | 2 | Details |
| US3159810A | Data transmission systems with error detection and correcti… | Expired / Lapsed | 1960-03-21 | 1964-12-01 | 2 | Details |
| US3139600A | Variable voltage generator | Expired / Lapsed | 1960-12-12 | 1964-06-30 | 2 | Details |
| US3135951A | Secure communication line | Expired / Lapsed | 1962-05-31 | 1964-06-02 | 2 | Details |
| US3121802A | Multivibrator circuit employing transistors of complementar… | Expired / Lapsed | 1959-01-23 | 1964-02-18 | 2 | Details |
| US3109958A | Electroluminescent devices with overload protection | Expired / Lapsed | 1961-06-22 | 1963-11-05 | 2 | Details |
| US3098973A | Antenna incorporating active elements | Expired / Lapsed | 1960-05-27 | 1963-07-23 | 2 | Details |
| US3094610A | Electronic computers | Expired / Lapsed | 1959-06-02 | 1963-06-18 | 2 | Details |
| US3069657A | Selective calling system | Expired / Lapsed | 1958-06-11 | 1962-12-18 | 0 | Details |
| US3061192A | Data processing system | Expired / Lapsed | 1958-08-18 | 1962-10-30 | 0 | Details |
| US3059115A | Energy storage device | Expired / Lapsed | 1958-04-10 | 1962-10-16 | 2 | Details |
| US3056906A | Switching circuit | Expired / Lapsed | 1959-12-28 | 1962-10-02 | 0 | Details |
| US3035200A | Electroluminescent display device | Expired / Lapsed | 1959-11-25 | 1962-05-15 | 0 | Details |
| US3027465A | Logic nor circuit with speed-up capacitors having added ser… | Expired / Lapsed | 1958-04-16 | 1962-03-27 | 0 | Details |
| US3015044A | Electroluminescent lamp | Expired / Lapsed | 1956-11-19 | 1961-12-26 | 0 | Details |
| US2995686A | Microelectronic circuit module | Expired / Lapsed | 1959-03-02 | 1961-08-08 | 0 | Details |
| US2971160A | Anode current regulation | Expired / Lapsed | 1958-11-25 | 1961-02-07 | 0 | Details |
| US2951168A | Electroluminescent device | Expired / Lapsed | 1958-11-28 | 1960-08-30 | 0 | Details |
| US2929968A | Thermal switches | Expired / Lapsed | 1956-04-30 | 1960-03-22 | 0 | Details |
| US2924747A | Shift register | Expired / Lapsed | 1958-06-16 | 1960-02-09 | 0 | Details |
| US2922923A | Electroluminescent devices | Expired / Lapsed | 1959-03-19 | 1960-01-26 | 0 | Details |
| US2922898A | Electronic counter | Expired / Lapsed | 1956-03-27 | 1960-01-26 | 0 | Details |
| US2919355A | Bi-stable transistor circuit | Expired / Lapsed | 1953-12-31 | 1959-12-29 | 0 | Details |
| US2912794A | Electron tube | Expired / Lapsed | 1956-11-29 | 1959-11-17 | 0 | Details |
| US2913704A | Multiple emitter matrices | Expired / Lapsed | 1954-07-06 | 1959-11-17 | 0 | Details |
| US2910909A | Colorimeter | Expired / Lapsed | 1957-01-28 | 1959-11-03 | 0 | Details |
| US2903378A | Process of forming luminescent screens | Expired / Lapsed | 1957-12-31 | 1959-09-08 | 2 | Details |
| US2898556A | Oscillator | Expired / Lapsed | 1957-05-01 | 1959-08-04 | 0 | Details |
| US2872621A | Adding and subtracting drive circuit for counting tubes | Expired / Lapsed | 1956-09-27 | 1959-02-03 | 0 | Details |
| US2842764A | Collision warning radar | Expired / Lapsed | 1951-02-21 | 1958-07-08 | 0 | Details |
| US2832928A | Voltage regulator for pulse forming network | Expired / Lapsed | 1953-07-17 | 1958-04-29 | 0 | Details |
| US2825822A | Transistor switching circuits | Expired / Lapsed | 1955-08-03 | 1958-03-04 | 0 | Details |
| US2824992A | Electroluminescent lamp | Expired / Lapsed | 1955-01-17 | 1958-02-25 | 2 | Details |
| US2822518A | Testing circuit | Expired / Lapsed | 1956-11-21 | 1958-02-04 | 0 | Details |
| US2822498A | Tube construction for automatic production | Expired / Lapsed | 1954-04-19 | 1958-02-04 | 0 | Details |
| US2818381A | Coating filamentary material | Expired / Lapsed | 1955-04-18 | 1957-12-31 | 2 | Details |
| US2777059A | Echo suppression beacons | Expired / Lapsed | 1951-04-13 | 1957-01-08 | 0 | Details |
| US2776391A | Induction lamp | Expired / Lapsed | 1955-12-30 | 1957-01-01 | 0 | Details |
| US2773925A | Electrical translator and methods | Expired / Lapsed | 1951-03-10 | 1956-12-11 | 2 | Details |
| US2773216A | Animated display device | Expired / Lapsed | 1953-01-09 | 1956-12-04 | 0 | Details |
| US2744372A | Article handling device | Expired / Lapsed | 1955-08-02 | 1956-05-08 | 0 | Details |
| US2728870A | Electroluminescent lamp | Expired / Lapsed | 1952-09-20 | 1955-12-27 | 2 | Details |
| US2693584A | Electrical component assembly | Expired / Lapsed | 1953-08-18 | 1954-11-02 | 0 | Details |
| US2686885A | Insulated coated grid for electron discharge devices | Expired / Lapsed | 1949-11-26 | 1954-08-17 | 0 | Details |
| US2684450A | Electroluminescent lamp | Expired / Lapsed | 1949-07-20 | 1954-07-20 | 0 | Details |
| US2633526A | Electrical circuit apparatus | Expired / Lapsed | 1949-05-13 | 1953-03-31 | 0 | Details |
| US2630560A | Radio-frequency transformer | Expired / Lapsed | 1949-04-05 | 1953-03-03 | 0 | Details |
| US2615965A | Crystal amplifier device | Expired / Lapsed | 1948-07-24 | 1952-10-28 | 0 | Details |
| US2611102A | Traveling wave tube | Expired / Lapsed | 1948-11-13 | 1952-09-16 | 0 | Details |
| US2595052A | Crystal amplifier | Expired / Lapsed | 1948-07-23 | 1952-04-29 | 0 | Details |
| US2586609A | Point-contact electrical device | Expired / Lapsed | 1950-05-27 | 1952-02-19 | 0 | Details |
| US2584597A | Traveling wave tube | Expired / Lapsed | 1949-01-26 | 1952-02-05 | 0 | Details |
| US2575448A | Electron discharge device | Expired / Lapsed | 1945-08-22 | 1951-11-20 | 0 | Details |
| US2570716A | Signal transmission network | Expired / Lapsed | 1948-11-27 | 1951-10-09 | 0 | Details |
| US2555877A | Glass-to-metal seal | Expired / Lapsed | 1945-07-20 | 1951-06-05 | 0 | Details |
| US2547869A | Fluorescent lamp electrode | Expired / Lapsed | 1947-10-31 | 1951-04-03 | 0 | Details |
| US2523840A | Fluorescent lighting fixture | Expired / Lapsed | 1945-01-29 | 1950-09-26 | 0 | Details |
| US2502855A | Preoxidation of stainless steel | Expired / Lapsed | 1944-10-18 | 1950-04-04 | 0 | Details |
| US2486025A | Rectifier tube and circuit | Expired / Lapsed | 1945-09-12 | 1949-10-25 | 0 | Details |
| US2476066A | Crystal matrix | Expired / Lapsed | 1948-05-06 | 1949-07-12 | 0 | Details |
| US2472770A | Resistance apparatus for converting mechanical movement int… | Expired / Lapsed | 1945-11-20 | 1949-06-07 | 0 | Details |
| US2457695A | Ultra high frequency apparatus for inspection of sheet and … | Expired / Lapsed | 1945-09-24 | 1948-12-28 | 0 | Details |
| US2457495A | Ultra high frequency tube | Expired / Lapsed | 1944-12-18 | 1948-12-28 | 0 | Details |
| US2444408A | Electric gaseous discharge lamp circuit | Expired / Lapsed | 1946-08-06 | 1948-06-29 | 0 | Details |
| US2432466A | Interdigital magnetron | Expired / Lapsed | 1946-11-29 | 1947-12-09 | 0 | Details |
| US2422628A | Glass to metal seal | Expired / Lapsed | 1943-06-12 | 1947-06-17 | 0 | Details |
| US2399661A | Phase comparison apparatus | Expired / Lapsed | 1943-05-26 | 1946-05-07 | 0 | Details |
| US2394892A | Electronic phase bridge | Expired / Lapsed | 1943-07-16 | 1946-02-12 | 0 | Details |
| US2392785A | Lamp base | Expired / Lapsed | 1945-03-28 | 1946-01-08 | 0 | Details |
| US2329024A | Cathode coating machine | Expired / Lapsed | 1940-11-23 | 1943-09-07 | 0 | Details |
| US2324455A | Lamp coating apparatus | Expired / Lapsed | 1942-02-28 | 1943-07-13 | 0 | Details |