NTT Inc
NTT IncActive Patents
0
Total Holdings
66
Patent Holdings
Filter in Explorer →| Patent No. | Title | Status | Filing Date | Grant Date | Claims | Actions |
|---|---|---|---|---|---|---|
| EP0777354A2 | Digital transmission apparatus using differential coding an… | Expired / Lapsed | 1996-11-28 | — | 8 | Details |
| JPH0878657A | Optical / electronic hybrid mounting substrate and its manu… | Expired / Lapsed | 1994-08-09 | — | 0 | Details |
| JPH088962A | Business card processing method and device for online busin… | Expired / Lapsed | 1994-06-22 | — | 0 | Details |
| JPH0335625A | Method for controlling transmission power in mobile communi… | Expired / Lapsed | 1989-07-03 | — | 0 | Details |
| JPH02199979A | Charged program distribution system | Expired / Lapsed | 1989-01-27 | — | 0 | Details |
| JPS6396590A | Duct location searching method | Expired / Lapsed | 1986-10-14 | — | 0 | Details |
| JPS6395764A | Automatic sending system for information | Expired / Lapsed | 1986-10-11 | — | 0 | Details |
| JPS60219647A | Multi-layer recording medium | Expired / Lapsed | 1984-04-13 | — | 0 | Details |
| JPS60202545A | Multi-layer optical recording and reproducing method | Expired / Lapsed | 1984-03-27 | — | 0 | Details |
| JPS60172842A | Controller of optical reception circuit | Expired / Lapsed | 1984-02-06 | — | 0 | Details |
| JPS6040542A | optical memory medium | Expired / Lapsed | 1983-08-12 | — | 0 | Details |
| JPS5860726A | Optical switch | Expired / Lapsed | 1981-10-08 | — | 0 | Details |
| JPS5833331A | Portable telephone system of wide region | Expired / Lapsed | 1981-08-21 | — | 0 | Details |
| JPS57193143A | Optical polarized wave transmitting system | Expired / Lapsed | 1981-05-25 | — | 0 | Details |
| JPS5658338A | Composite type radio channel location system in mobile comm… | Expired / Lapsed | 1979-10-18 | — | 0 | Details |
| JPS5573151A | Time-division optical transmission system | Expired / Lapsed | 1978-11-27 | — | 0 | Details |
| JPS544153A | Directive coupler using optical waveguide | Expired / Lapsed | 1977-06-13 | — | 0 | Details |
| DE2702023A1 | METHOD AND DEVICE FOR ALLOCATING FREE VOICE CHANNELS TO A M… | Expired / Lapsed | 1977-01-19 | — | 0 | Details |
| JPS538510A | Branching device for photo time division signal | Expired / Lapsed | 1976-07-12 | — | 0 | Details |
| JPS51139747A | Corrugate horn | Expired / Lapsed | 1975-05-28 | — | 0 | Details |
| DE2448412A1 | LOUDSPEAKER TELEPHONE SWITCH | Expired / Lapsed | 1974-10-10 | — | 0 | Details |
| US6298060B1 | Layer 2 integrated access scheme | Expired / Lapsed | 1998-04-30 | 2001-10-02 | 16 | Details |
| US6212570B1 | Information distribution device selection system | Expired / Lapsed | 1998-08-31 | 2001-04-03 | 16 | Details |
| JP3025798B2 | Photochemical secondary battery and method of manufacturing… | Expired / Lapsed | 1990-11-06 | 2000-03-27 | 0 | Details |
| US5216733A | Polarization maintaining optical fiber connector including … | Expired / Lapsed | 1992-03-10 | 1993-06-01 | 24 | Details |
| US4928278A | IC test system | Expired / Lapsed | 1988-08-05 | 1990-05-22 | 30 | Details |
| US4750799A | Hybrid optical integrated circuit | Expired / Lapsed | 1985-07-10 | 1988-06-14 | 16 | Details |
| US4672410A | Semiconductor memory device with trench surrounding each me… | Expired / Lapsed | 1985-07-09 | 1987-06-09 | 15 | Details |
| USD290116S | Telephone | Expired / Lapsed | 1985-09-03 | 1987-06-02 | 1 | Details |
| US4564997A | Semiconductor device and manufacturing process thereof | Expired / Lapsed | 1982-04-16 | 1986-01-21 | 8 | Details |
| US4561099A | Clock recovery system for TDMA satellite communication syst… | Expired / Lapsed | 1983-12-02 | 1985-12-24 | 7 | Details |
| US4521069A | Optical switch | Expired / Lapsed | 1982-04-01 | 1985-06-04 | 15 | Details |
| US4450031A | Ion shower apparatus | Expired / Lapsed | 1983-09-08 | 1984-05-22 | 11 | Details |
| US4426247A | Method for forming micropattern | Expired / Lapsed | 1983-04-06 | 1984-01-17 | 14 | Details |
| US4399372A | Integrated circuit having spare parts activated by a high-t… | Expired / Lapsed | 1980-12-08 | 1983-08-16 | 16 | Details |
| US4397036A | Diversity system | Expired / Lapsed | 1979-05-03 | 1983-08-02 | 15 | Details |
| US4379946A | Signalling system and signal control equipment for multi-ad… | Expired / Lapsed | 1981-05-20 | 1983-04-12 | 12 | Details |
| US4372647A | Single mode optical fibers | Expired / Lapsed | 1980-10-01 | 1983-02-08 | 8 | Details |
| US4320523A | Digital signal reception system | Expired / Lapsed | 1980-02-04 | 1982-03-16 | 18 | Details |
| US4308066A | Glass for optical fibers | Expired / Lapsed | 1980-09-23 | 1981-12-29 | 9 | Details |
| US4300390A | Apparatus for determining positional coordinates utilizing … | Expired / Lapsed | 1979-09-14 | 1981-11-17 | 9 | Details |
| US4205341A | Picture signal coding apparatus | Expired / Lapsed | 1978-11-14 | 1980-05-27 | 11 | Details |
| US4144412A | Method of assigning a radio channel to a calling mobile bod… | Expired / Lapsed | 1977-01-17 | 1979-03-13 | 21 | Details |
| US4142155A | Diversity system | Expired / Lapsed | 1977-05-11 | 1979-02-27 | 11 | Details |
| US4127744A | Mobile radio communication system | Expired / Lapsed | 1977-07-14 | 1978-11-28 | 7 | Details |
| US4125860A | Reproducer for an eraseable videodisc | Expired / Lapsed | 1976-06-08 | 1978-11-14 | 15 | Details |
| US4096440A | Control system for mobile radio communication | Expired / Lapsed | 1977-04-22 | 1978-06-20 | 4 | Details |
| US4087729A | Position finely adjusting apparatus | Expired / Lapsed | 1976-04-20 | 1978-05-02 | 29 | Details |
| US4070590A | Sensing circuit for memory cells | Expired / Lapsed | 1976-08-09 | 1978-01-24 | 7 | Details |
| US4057758A | Mobile diversity radio communication system | Expired / Lapsed | 1975-10-02 | 1977-11-08 | 20 | Details |
| US4032846A | Digital mobile communication system and method | Expired / Lapsed | 1975-10-08 | 1977-06-28 | 5 | Details |
| US4002860A | Transmitting and receiving apparatus | Expired / Lapsed | 1975-04-02 | 1977-01-11 | 10 | Details |
| US3950073A | Eccentric core optical waveguide | Expired / Lapsed | 1974-05-23 | 1976-04-13 | 16 | Details |
| US3763493A | Antenna device applicable for two different frequency bands | Expired / Lapsed | 1971-10-06 | 1973-10-02 | 8 | Details |
| US3698001A | Frequency group separation filter device using laminated di… | Expired / Lapsed | 1970-11-05 | 1972-10-10 | 14 | Details |
| US3676778A | Satellite communication system | Expired / Lapsed | 1970-08-20 | 1972-07-11 | 5 | Details |
| US3668312A | Television telephone system | Expired / Lapsed | 1970-04-02 | 1972-06-06 | 12 | Details |
| US3661441A | Arrangement for acousto-optical light deflection | Expired / Lapsed | 1970-10-27 | 1972-05-09 | 23 | Details |
| US3640806A | Semiconductor device and method of producing the same | Expired / Lapsed | 1970-01-05 | 1972-02-08 | 3 | Details |
| US3588840A | Method of block recording data on a magnetic tape | Expired / Lapsed | 1969-02-05 | 1971-06-28 | 0 | Details |
| US3484658A | Temperature compensated semiconductor resistor | Expired / Lapsed | 1967-08-21 | 1969-12-16 | 0 | Details |
| US3284676A | Bilaterally bistable semi-conductor device | Expired / Lapsed | 1961-12-21 | 1966-11-08 | 2 | Details |
| FR1431313A | Semiconductor device | Expired / Lapsed | 1965-03-25 | 1966-03-11 | 0 | Details |
| US3182333A | Electrostatic high speed printer | Expired / Lapsed | 1962-12-06 | 1965-05-04 | 2 | Details |
| US3092693A | Electromagnetic receiver | Expired / Lapsed | 1960-12-12 | 1963-06-04 | 2 | Details |
| US2928008A | Signal lockout device used in telephone exchange system or … | Expired / Lapsed | 1957-02-12 | 1960-03-08 | 0 | Details |