NEC Corp
NEC CorpActive Patents
0
Total Holdings
89
Patent Holdings
Filter in Explorer →| Patent No. | Title | Status | Filing Date | Grant Date | Claims | Actions |
|---|---|---|---|---|---|---|
| JPH0743565A | Coupling structure of optical semiconductor device and opti… | Expired / Lapsed | 1993-07-27 | — | 0 | Details |
| EP0147808A2 | Optical switch | Expired / Lapsed | 1984-12-20 | — | 4 | Details |
| JPS61102081A | Frequency stabilization of semiconductor laser | Expired / Lapsed | 1984-10-25 | — | 0 | Details |
| JPS59122140A | Optical heterodyne detector | Expired / Lapsed | 1982-12-28 | — | 0 | Details |
| JPS57147291A | Light transmission circuit | Expired / Lapsed | 1981-03-06 | — | 0 | Details |
| JPS56148792A | Testing method for margin voltage of memory cell | Expired / Lapsed | 1980-04-21 | — | 0 | Details |
| DE2524845A1 | LIGHT GUIDE COUPLING FOR COUPLING TWO LIGHT GUIDES | Expired / Lapsed | 1975-06-04 | — | 0 | Details |
| US6403948B1 | Photo-detecting module having a fiber optic groove on rear … | Expired / Lapsed | 1999-12-28 | 2002-06-11 | 9 | Details |
| US5460547A | Port replicator | Expired / Lapsed | 1993-08-10 | 1995-10-24 | 10 | Details |
| US5253238A | Arrangement for producing precise tracking error signal for… | Expired / Lapsed | 1992-07-17 | 1993-10-12 | 7 | Details |
| US5208777A | Semiconductor memory device | Expired / Lapsed | 1991-12-02 | 1993-05-04 | 5 | Details |
| US5068865A | Semiconductor laser module | Expired / Lapsed | 1989-06-09 | 1991-11-26 | 8 | Details |
| US4853612A | RF power control circuit | Expired / Lapsed | 1988-11-23 | 1989-08-01 | 4 | Details |
| US4847758A | Main memory access in a microprocessor system with a cache … | Expired / Lapsed | 1987-10-30 | 1989-07-11 | 13 | Details |
| US4839862A | Static random access memory having Bi-CMOS construction | Expired / Lapsed | 1987-08-14 | 1989-06-13 | 10 | Details |
| US4806109A | Shielded electrical connector | Expired / Lapsed | 1988-01-26 | 1989-02-21 | 5 | Details |
| US4797678A | Device for predicting unique word detection positions in a … | Expired / Lapsed | 1985-06-13 | 1989-01-10 | 5 | Details |
| US4794649A | Radio communication system with power saving disablement pr… | Expired / Lapsed | 1987-04-29 | 1988-12-27 | 18 | Details |
| US4727484A | Memory address control apparatus with separate translation … | Expired / Lapsed | 1986-12-24 | 1988-02-23 | 2 | Details |
| US4704126A | Chemical polishing process for titanium and titanium alloy … | Expired / Lapsed | 1985-04-15 | 1987-11-03 | 11 | Details |
| US4677687A | Method of establishing communication relay between mobile u… | Expired / Lapsed | 1985-06-21 | 1987-06-30 | 6 | Details |
| US4669805A | High frequency connector | Expired / Lapsed | 1985-06-21 | 1987-06-02 | 10 | Details |
| US4669053A | Portable personal computer | Expired / Lapsed | 1984-05-31 | 1987-05-26 | 6 | Details |
| US4641366A | Portable radio communication apparatus comprising an antenn… | Expired / Lapsed | 1985-10-03 | 1987-02-03 | 8 | Details |
| US4587446A | Field effect transistor output circuit operable by a reduce… | Expired / Lapsed | 1983-05-31 | 1986-05-06 | 16 | Details |
| US4580240A | Memory arrangement operable as a cache and a local memory | Expired / Lapsed | 1982-12-14 | 1986-04-01 | 3 | Details |
| US4523332A | Battery saver circuit for use with paging receiver | Expired / Lapsed | 1983-04-11 | 1985-06-11 | 11 | Details |
| US4470141A | Multi-direction time division multiplex communication system | Expired / Lapsed | 1979-06-06 | 1984-09-04 | 11 | Details |
| US4392242A | Mobile communication system | Expired / Lapsed | 1981-03-05 | 1983-07-05 | 4 | Details |
| US4343536A | Electro-optic light deflector | Expired / Lapsed | 1980-05-12 | 1982-08-10 | 25 | Details |
| US4319221A | Similarity calculator comprising a buffer for a single inpu… | Expired / Lapsed | 1980-05-27 | 1982-03-09 | 3 | Details |
| US4267583A | Memory test device with write and pseudo write signals | Expired / Lapsed | 1979-11-27 | 1981-05-12 | 22 | Details |
| US4239936A | Speech recognition system | Expired / Lapsed | 1978-12-28 | 1980-12-16 | 10 | Details |
| US4184085A | Semiconductor memory device comprising a p-n junction in a … | Expired / Lapsed | 1978-01-10 | 1980-01-15 | 25 | Details |
| US4167653A | Adaptive speech signal detector | Expired / Lapsed | 1978-04-12 | 1979-09-11 | 4 | Details |
| US4144409A | Mobile radio communication control system for preventing er… | Expired / Lapsed | 1977-08-30 | 1979-03-13 | 3 | Details |
| US4143322A | Carrier wave recovery system apparatus using synchronous de… | Expired / Lapsed | 1977-09-30 | 1979-03-06 | 10 | Details |
| US4125878A | Memory circuit | Expired / Lapsed | 1977-07-11 | 1978-11-14 | 11 | Details |
| US4090096A | Timing signal generator circuit | Expired / Lapsed | 1977-03-29 | 1978-05-16 | 11 | Details |
| US4079339A | Light self-injecting semiconductor laser device | Expired / Lapsed | 1976-05-12 | 1978-03-14 | 12 | Details |
| US4057762A | Device for phase synchronizing a reproduced reference carri… | Expired / Lapsed | 1976-12-21 | 1977-11-08 | 6 | Details |
| US4016588A | Non-volatile semiconductor memory device | Expired / Lapsed | 1975-12-24 | 1977-04-05 | 8 | Details |
| US3913017A | Channel switching device for mobile radio communication equ… | Expired / Lapsed | 1974-03-28 | 1975-10-14 | 3 | Details |
| US3889811A | Flat-article sorting apparatus for an automatic mail handli… | Expired / Lapsed | 1973-06-18 | 1975-06-17 | 4 | Details |
| US3885229A | Document scanning apparatus | Expired / Lapsed | 1973-10-25 | 1975-05-20 | 8 | Details |
| US3816722A | Computer for calculating the similarity between patterns an… | Expired / Lapsed | 1971-09-28 | 1974-06-11 | 28 | Details |
| US3778776A | Electronic computer comprising a plurality of general purpo… | Expired / Lapsed | 1971-06-10 | 1973-12-11 | 3 | Details |
| US3769587A | Synchronizing system for phase-modulation telecommunication… | Expired / Lapsed | 1972-10-06 | 1973-10-30 | 9 | Details |
| US3737882A | Cylindrical magnetic domain memory apparatus | Expired / Lapsed | 1972-01-28 | 1973-06-05 | 12 | Details |
| US3731161A | Semiconductor integrated circuit | Expired / Lapsed | 1971-09-03 | 1973-05-01 | 4 | Details |
| US3706053A | Synthesized network for signal transmission | Expired / Lapsed | 1971-02-18 | 1972-12-12 | 0 | Details |
| US3699261A | Frame synchronizing circuit for high clock frequency digita… | Expired / Lapsed | 1970-11-18 | 1972-10-17 | 7 | Details |
| US3659162A | Semiconductor integrated circuit device having improved wir… | Expired / Lapsed | 1969-12-19 | 1972-04-25 | 1 | Details |
| US3634667A | Digital interpolator | Expired / Lapsed | 1970-04-27 | 1972-01-11 | 12 | Details |
| US3622897A | Bias circuit for a differential amplifier | Expired / Lapsed | 1969-12-19 | 1971-11-23 | 2 | Details |
| US3593302A | Periphery-control-units switching device | Expired / Lapsed | 1968-03-29 | 1971-07-13 | 14 | Details |
| US3573750A | High-speed memory system | Expired / Lapsed | 1969-04-01 | 1971-04-06 | 20 | Details |
| US3551813A | Time division satellite communication system | Expired / Lapsed | 1967-11-16 | 1970-12-29 | 0 | Details |
| US3533965A | Low expansion material | Expired / Lapsed | 1967-09-11 | 1970-10-13 | 0 | Details |
| US3530251A | Video telephone set | Expired / Lapsed | 1967-11-21 | 1970-09-22 | 0 | Details |
| US3519991A | Optical character reading apparatus | Expired / Lapsed | 1968-02-02 | 1970-07-07 | 0 | Details |
| US3517312A | Telephone and telegraph switching system utilizing a statio… | Expired / Lapsed | 1967-02-23 | 1970-06-23 | 0 | Details |
| US3499713A | Laser communication device | Expired / Lapsed | 1966-06-13 | 1970-03-10 | 0 | Details |
| US3478171A | Time-division telephone exchange system having a variably s… | Expired / Lapsed | 1969-01-10 | 1969-11-11 | 0 | Details |
| US3457473A | Semiconductor device with schottky barrier formed on (100) … | Expired / Lapsed | 1966-11-08 | 1969-07-22 | 0 | Details |
| US3423647A | Semiconductor device having regions with preselected differ… | Expired / Lapsed | 1965-07-28 | 1969-01-21 | 0 | Details |
| US3402365A | Monochromatic optical maser | Expired / Lapsed | 1964-07-14 | 1968-09-17 | 0 | Details |
| US3384822A | Frequency-shift-keying phase-modulation code transmission s… | Expired / Lapsed | 1965-03-19 | 1968-05-21 | 0 | Details |
| US3336590A | Signal comparator | Expired / Lapsed | 1964-04-01 | 1967-08-15 | 2 | Details |
| US3320611A | Time-division radio relay communication system | Expired / Lapsed | 1965-03-30 | 1967-05-16 | 1 | Details |
| US3305855A | Encoder and a decoder with nonlinear quantization | Expired / Lapsed | 1963-11-01 | 1967-02-21 | 2 | Details |
| US3293365A | Telephone answering and recording apparatus with a single a… | Expired / Lapsed | 1964-07-22 | 1966-12-20 | 2 | Details |
| US3292081A | Apparatus for measuring the negative ratio of voltage | Expired / Lapsed | 1963-05-17 | 1966-12-13 | 2 | Details |
| US3286237A | Tabulator | Expired / Lapsed | 1962-10-26 | 1966-11-15 | 0 | Details |
| US3281828A | Encoder with non-linear quantization | Expired / Lapsed | 1963-08-27 | 1966-10-25 | 1 | Details |
| US3275749A | Two-stage multiplex switching system employing interlaced c… | Expired / Lapsed | 1965-10-08 | 1966-09-27 | 2 | Details |
| US3239908A | Method of making a semiconductor device | Expired / Lapsed | 1962-07-03 | 1966-03-15 | 2 | Details |
| US3235664A | Bidirectional code translation circuit | Expired / Lapsed | 1962-02-13 | 1966-02-15 | 1 | Details |
| US3231834A | Telemetering capsule for physiological measurements | Expired / Lapsed | 1962-10-05 | 1966-01-25 | 2 | Details |
| US3216411A | Ingestible transmitter for the detection of bleeding in the… | Expired / Lapsed | 1963-05-13 | 1965-11-09 | 2 | Details |
| US3211997A | Fault locating means for electric power transmission lines,… | Expired / Lapsed | 1960-01-13 | 1965-10-12 | 1 | Details |
| US3177414A | Device comprising a plurality of transistors | Expired / Lapsed | 1962-07-03 | 1965-04-06 | 2 | Details |
| US3171187A | Method of manufacturing semiconductor devices | Expired / Lapsed | 1963-05-01 | 1965-03-02 | 2 | Details |
| US3157875A | Moving target radar delay line filter | Expired / Lapsed | 1962-02-05 | 1964-11-17 | 1 | Details |
| US3144515A | Synchronization system in timedivision code transmission | Expired / Lapsed | 1961-03-27 | 1964-08-11 | 2 | Details |
| US3113253A | Capacitors | Expired / Lapsed | 1959-08-03 | 1963-12-03 | 2 | Details |
| US3069625A | Reception system of high sensitivity for frequency-or phase… | Expired / Lapsed | 1959-03-12 | 1962-12-18 | 0 | Details |
| US3065302A | Synchronizing system in time-division multiplex code modula… | Expired / Lapsed | 1960-08-19 | 1962-11-20 | 0 | Details |
| US2836776A | Capacitor | Expired / Lapsed | 1956-05-04 | 1958-05-27 | 2 | Details |