Issued Patents All Time
Showing 1–25 of 31 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8391914 | Transmitting apparatus, communication apparatus, receiving apparatus, communication system, broadcast receiving system, control program, communication method and broadcast receiving method | — | 2013-03-05 |
| 8335153 | Orthogonal frequency division multiplex modem circuit | Masaki Ichihara | 2012-12-18 |
| 7843803 | Orthogonal frequency division multiplex modem circuit | Masaki Ichihara | 2010-11-30 |
| 7395486 | Image communication system using a hierarchical code comprised of a plurality of layers | — | 2008-07-01 |
| 7099268 | Orthogonal frequency division multiplex modem circuit | Masaki Ichihara | 2006-08-29 |
| 6363100 | Radio data communication system using spread spectrum scheme | Masahiro Ohki | 2002-03-26 |
| RE36309 | Handoff method for cellular digital mobile communication system and mobile station | Toshihito Kanai | 1999-09-21 |
| 5809019 | Transmisson diversity system | Masaki Ichihara | 1998-09-15 |
| 5748668 | Spread spectrum method for transmitting an information signal as a radio signal at a high speed | Hideho Tomita, Masahiro Ooki | 1998-05-05 |
| 5745858 | Base station transmitter/receiver capable of varying composite directivity of antennas | Toshifumi Sato | 1998-04-28 |
| 5625639 | Spread spectrum method for transmitting an information signal as a radio signal at a high speed | Hideho Tomita, Masahiro Ooki | 1997-04-29 |
| 5590404 | Base station transmission-reception apparatus for cellular system | Toshifumi Sato | 1996-12-31 |
| 5577087 | Variable modulation communication method and system | — | 1996-11-19 |
| 5444721 | Maximum likelihood sequence estimation apparatus | Kazuhiro Okanoue, Akihisa Ushirokawa | 1995-08-22 |
| 5442803 | Half duplex communication system having quick channel assignments | — | 1995-08-15 |
| 5420863 | Mobile communication system with cell-site switching for intra-cell handoff | Masanori Taketsugu | 1995-05-30 |
| 5363411 | Low power consumption receiver with adaptive equalizer | Kazuhiro Okanoue, Akihisa Ushirokawa, Hideho Tomita | 1994-11-08 |
| 5319795 | Cellular mobile communications system using frequencies commonly shared by neighboring cells for handoff operations | Kojiro Hamabe, Toshihito Kanai, Masanori Taketsugu | 1994-06-07 |
| 5303226 | Reception of TDMA digital data signal with compensation for channel variations | Kazuhiro Okanoue | 1994-04-12 |
| 5272447 | Demodulator and demodulation method for a digital phase modulated signal | Soichi Tsumura | 1993-12-21 |
| 5272726 | Blind type sequence estimator for use in communications system | Akihisa Ushirokawa | 1993-12-21 |
| 5157661 | Handoff method for cellular digital mobile communication system and mobile station | Toshihito Kanai | 1992-10-20 |
| 5101503 | Method of connecting channels of decentralized radio systems | — | 1992-03-31 |
| 4888767 | Repeat request signal transmission method for multi-station packet communication | Fumio Akashi | 1989-12-19 |
| 4764920 | Packet transmission system | — | 1988-08-16 |