Issued Patents All Time
Showing 51–73 of 73 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5572537 | Modulator-demodulator device capable of detecting an unsynchronized frame state based on hard and soft error values | Yasunao Mizutani | 1996-11-05 |
| 5570390 | Timing generation device and data transmission device having the timing generation device | Kyoko Hirao | 1996-10-29 |
| 5563908 | Modulator and demodulator apparatus | Noboru Kawada | 1996-10-08 |
| 5559799 | Modulator and demodulator apparatus as well as modulation and demodulation method | Hiroyasu Murata, Hideo Miyazawa | 1996-09-24 |
| 5557632 | Demodulation and roll-off filter apparatus | Hiroyasu Murata | 1996-09-17 |
| 5537437 | Initialization equalization for modulation and demodulation using special training pattern | Hiroyasu Murata, Noboru Kawada, Kyoko Hirao, Hideo Miyazawa, Yuri Nigaki | 1996-07-16 |
| 5448595 | Automatic gain control circuit for a demodulation section of a modem | Hiroyasu Murata, Tohru Ogawa | 1995-09-05 |
| 5442656 | Timing extraction device and data transmission device using the timing extraction device | Noboru Kawada | 1995-08-15 |
| 5440589 | Frequency offset dealing modulator and demodulator apparatus | Hiroyasu Murata, Kyoko Hirao | 1995-08-08 |
| 5319650 | Modulator-demodulator device capable of detecting an unsynchronized frame state | Yasunao Mizutani | 1994-06-07 |
| 5189684 | Line signal deterioration removing systems | Hiroki KISHIMOTO, Kyoko Hirao | 1993-02-23 |
| 5175745 | Transversal type automatic equalizer with tap coefficient protection | Hiroki KISHIMOTO | 1992-12-29 |
| 5077755 | Digital signal processing system in modem | Kyoko Endo | 1991-12-31 |
| 4868850 | MODEM communication system having training means and method for training same | Yasuhiro Arai | 1989-09-19 |
| 4799214 | Two-wire full duplex frequency division multiplex modem system having echo cancellation means | — | 1989-01-17 |
| 4694469 | Method and device for timing pull-in of receiving equipment | Yasuhiro Arai | 1987-09-15 |
| 4672630 | Training method of data receiving equipment | — | 1987-06-09 |
| 4630126 | Method of signal transmission with selected signal transmission rate | Ryoji Okita, Masayoshi Inoue, Shozo Kudo | 1986-12-16 |
| 4607230 | Receiver unit having synchronous pull-in circuit | Chihiro Endo | 1986-08-19 |
| 4571733 | Automatic equalization device and method of starting-up the same | Shigeyuki Unagami, Masayoshi Inoue | 1986-02-18 |
| 4482973 | Digital automatic gain control circuit | Shigeyuki Unagami, Kuninosuke Ihira | 1984-11-13 |
| 4445224 | Pull-in circuit for a digital phase locked loop | Kuninosuke Ihira, Shigeyuki Unagami | 1984-04-24 |
| 4317207 | Data transmission system | Noriaki Fujimura, Tsuneo Kinoshita, Tadashi Aono, Yasuya Tanaka | 1982-02-23 |