Ampex Corp
Ampex CorpActive Patents
0
Total Holdings
72
Patent Holdings
Filter in Explorer →| Patent No. | Title | Status | Filing Date | Grant Date | Claims | Actions |
|---|---|---|---|---|---|---|
| US5047883A | Pantograph head mount having double leaves integral with a … | Expired / Lapsed | 1990-02-07 | 1991-09-10 | 20 | Details |
| US4970581A | Circuit for and method of detecting color field sequence in… | Expired / Lapsed | 1988-09-09 | 1990-11-13 | 24 | Details |
| US4923053A | Flexible member mounting assembly | Expired / Lapsed | 1987-04-10 | 1990-05-08 | 34 | Details |
| US4820109A | Bidirectional transfer mechanism | Expired / Lapsed | 1986-04-11 | 1989-04-11 | 41 | Details |
| US4564915A | YIQ Computer graphics system | Expired / Lapsed | 1982-03-01 | 1986-01-14 | 46 | Details |
| US4475161A | YIQ Computer graphics system | Expired / Lapsed | 1982-02-26 | 1984-10-02 | 36 | Details |
| US4232257A | Web transport capstan control system | Expired / Lapsed | 1976-05-03 | 1980-11-04 | 67 | Details |
| US4212043A | Magnetic transducing | Expired / Lapsed | 1978-11-01 | 1980-07-08 | 10 | Details |
| US4184183A | Field replaceable heads for magnetic tape machine | Expired / Lapsed | 1978-04-07 | 1980-01-15 | 11 | Details |
| US4180701A | Phase lock loop for data decoder clock generator | Expired / Lapsed | 1977-01-28 | 1979-12-25 | 7 | Details |
| US4122477A | Method and apparatus for inserting synchronizing words in a… | Expired / Lapsed | 1977-01-28 | 1978-10-24 | 42 | Details |
| US4099211A | Positionable transducing mounting structure and driving sys… | Expired / Lapsed | 1976-09-13 | 1978-07-04 | 42 | Details |
| US3924167A | Three Phase brushless DC motor | Expired / Lapsed | 1973-09-17 | 1975-12-02 | 7 | Details |
| US3834648A | Apparatus and method for sensing diameter of tape pack on s… | Expired / Lapsed | 1972-03-15 | 1974-09-10 | 7 | Details |
| US3743378A | Optical intensity matching means for two light beams | Expired / Lapsed | 1971-07-30 | 1973-07-03 | 8 | Details |
| US3733523A | Electronic circuit card cage | Expired / Lapsed | 1972-02-11 | 1973-05-15 | 9 | Details |
| US3697149A | Fourier transform holographic storage and retrieval system | Expired / Lapsed | 1969-12-10 | 1972-10-10 | 17 | Details |
| US3663764A | Automatic tracking circuit for transverse scan magnetic tap… | Expired / Lapsed | 1970-04-06 | 1972-05-16 | 2 | Details |
| US3663763A | Automatic tracking method and apparatus for rotary scan tap… | Expired / Lapsed | 1970-04-06 | 1972-05-16 | 5 | Details |
| US3663877A | Brushless dc motor including tachometer commutation circuit | Expired / Lapsed | 1970-04-02 | 1972-05-16 | 8 | Details |
| US3578262A | Cassette changer with fast tape wind | Expired / Lapsed | 1969-11-10 | 1971-05-11 | 8 | Details |
| US3576496A | Digital controlled time multiplier | Expired / Lapsed | 1969-11-17 | 1971-04-27 | 11 | Details |
| US3573360A | Electronic web timer | Expired / Lapsed | 1968-12-13 | 1971-04-06 | 3 | Details |
| US3532974A | Time error compensator | Expired / Lapsed | 1968-03-29 | 1970-10-06 | 0 | Details |
| US3520586A | Entrant beam optical scanner | Expired / Lapsed | 1966-06-20 | 1970-07-14 | 0 | Details |
| US3493694A | Magnetoresistive head | Expired / Lapsed | 1966-01-19 | 1970-02-03 | 0 | Details |
| US3487392A | Incremental web member drive system | Expired / Lapsed | 1967-06-12 | 1969-12-30 | 0 | Details |
| US3484548A | Control apparatus for program distribution of broadcast and… | Expired / Lapsed | 1966-09-16 | 1969-12-16 | 2 | Details |
| US3463877A | Electronic editing system for video tape recordings | Expired / Lapsed | 1965-08-02 | 1969-08-26 | 0 | Details |
| US3437795A | Data input devices and systems | Expired / Lapsed | 1965-06-28 | 1969-04-08 | 0 | Details |
| US3435442A | Fluid lubricated magnetic tape transducer | Expired / Lapsed | 1965-03-26 | 1969-03-25 | 0 | Details |
| US3427603A | Magnetic thin film shift register | Expired / Lapsed | 1964-08-04 | 1969-02-11 | 0 | Details |
| US3416149A | Fluid lubricated magnetic tape transducer | Expired / Lapsed | 1965-03-26 | 1968-12-10 | 0 | Details |
| US3401236A | Magnetic tape apparatus with head positioning means | Expired / Lapsed | 1965-06-23 | 1968-09-10 | 2 | Details |
| US3379556A | Electroless plating system | Expired / Lapsed | 1965-02-24 | 1968-04-23 | 2 | Details |
| US3345547A | Step motor control system including a three stage energizat… | Expired / Lapsed | 1965-01-21 | 1967-10-03 | 1 | Details |
| US3319176A | High linearity limiter circuit using non-selected components | Expired / Lapsed | 1964-07-17 | 1967-05-09 | 2 | Details |
| US3293522A | Motor drive circuits | Expired / Lapsed | 1963-03-22 | 1966-12-20 | 1 | Details |
| US3267387A | Temperature and frequency stable amplifier | Expired / Lapsed | 1964-02-06 | 1966-08-16 | 2 | Details |
| US3267482A | Driver circuit for magnetic recording heads | Expired / Lapsed | 1962-01-22 | 1966-08-16 | 2 | Details |
| US3251563A | Magnetic tape transport system | Expired / Lapsed | 1963-03-26 | 1966-05-17 | 2 | Details |
| US3230307A | Interlock system for wideband magnetic recording and reprod… | Expired / Lapsed | 1962-09-04 | 1966-01-18 | 1 | Details |
| US3223929A | Binary frequency modulation demodulator | Expired / Lapsed | 1963-10-03 | 1965-12-14 | 2 | Details |
| US3222587A | Alternating current converting circuit | Expired / Lapsed | 1961-03-14 | 1965-12-07 | 2 | Details |
| US3200340A | Synchronization monitor | Expired / Lapsed | 1962-11-29 | 1965-08-10 | 2 | Details |
| US3199093A | Erasure prevention control for magnetic tape recorder | Expired / Lapsed | 1962-06-29 | 1965-08-03 | 2 | Details |
| US3187199A | Peak detecting and reshaping circuit | Expired / Lapsed | 1962-01-31 | 1965-06-01 | 1 | Details |
| US3179752A | Capstan servo system | Expired / Lapsed | 1960-08-22 | 1965-04-20 | 1 | Details |
| US3171754A | Magnetic storage medium for magneto-optical readout | Expired / Lapsed | 1961-01-30 | 1965-03-02 | 2 | Details |
| FR1384411A | Improvements to magnetic recording media | Expired / Lapsed | 1964-02-25 | 1965-01-04 | 0 | Details |
| US3146432A | Velocity or frequency sensing means | Expired / Lapsed | 1960-10-03 | 1964-08-25 | 2 | Details |
| US3139610A | Magnetic-core memory construction | Expired / Lapsed | 1961-11-06 | 1964-06-30 | 2 | Details |
| US3136867A | Electrostatic transducer | Expired / Lapsed | 1961-09-25 | 1964-06-09 | 2 | Details |
| US3134528A | Tape transport system | Expired / Lapsed | 1962-03-30 | 1964-05-26 | 2 | Details |
| US3129391A | Wide deviation frequency modulation signal generator | Expired / Lapsed | 1960-01-28 | 1964-04-14 | 2 | Details |
| US3108261A | Recording and/or reproducing system | Expired / Lapsed | 1960-04-11 | 1963-10-22 | 2 | Details |
| US3097267A | Tape recording and/or reproducing system and method | Expired / Lapsed | 1958-08-08 | 1963-07-09 | 2 | Details |
| US3095473A | Editing system for electronic recordings | Expired / Lapsed | 1960-05-16 | 1963-06-25 | 2 | Details |
| US3083303A | Diode input nor circuit including positive feedback | Expired / Lapsed | 1959-06-18 | 1963-03-26 | 1 | Details |
| US3070670A | Magnetic record head assembly | Expired / Lapsed | 1960-02-23 | 1962-12-25 | 0 | Details |
| US3034107A | Memory sensing circuit | Expired / Lapsed | 1960-12-27 | 1962-05-08 | 0 | Details |
| US3022461A | Frequency and/or phase demodulator | Expired / Lapsed | 1959-07-20 | 1962-02-20 | 0 | Details |
| US3016428A | Rotary head drive control mechanism and circuitry for recor… | Expired / Lapsed | 1958-08-04 | 1962-01-09 | 0 | Details |
| US3005582A | Tape recording and reproducing apparatus and drive system t… | Expired / Lapsed | 1959-08-13 | 1961-10-24 | 0 | Details |
| US2998495A | Recording and reproducing high frequencies transversely on … | Expired / Lapsed | 1958-03-26 | 1961-08-29 | 0 | Details |
| US2996349A | Nrz recording circuitry | Expired / Lapsed | 1957-11-29 | 1961-08-15 | 0 | Details |
| US2960563A | Magnetic tape system and method for recording and reproduci… | Expired / Lapsed | 1955-12-13 | 1960-11-15 | 0 | Details |
| US2912518A | Magnetic tape apparatus | Expired / Lapsed | 1956-01-24 | 1959-11-10 | 0 | Details |
| US2900451A | Magnetic transducing apparatus | Expired / Lapsed | 1955-08-24 | 1959-08-18 | 0 | Details |
| US2866012A | Magnetic tape recording and reproducing system | Expired / Lapsed | 1955-05-06 | 1958-12-23 | 0 | Details |
| US2838314A | Magnetic tape apparatus | Expired / Lapsed | 1952-10-20 | 1958-06-10 | 0 | Details |
| US2802201A | Recording apparatus and system | Expired / Lapsed | 1954-09-20 | 1957-08-06 | 0 | Details |