Issued Patents All Time
Showing 1–25 of 39 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5832027 | Spread spectrum modulating and demodulating apparatus for transmission and reception of FSK and PSK signals | — | 1998-11-03 |
| 5767705 | Frequency converting circuit | Yutaka Ichinoi | 1998-06-16 |
| 5760622 | Frequency converting circuit | — | 1998-06-02 |
| 5648736 | Frequency converting circuit | — | 1997-07-15 |
| 5539770 | Spread spectrum modulating apparatus using either PSK or FSK primary modulation | — | 1996-07-23 |
| 5402442 | Receiving device for receiving and demodulating spread spectrum-modulated GPS wave | — | 1995-03-28 |
| 5301206 | Spread spectrum communication system | Takahisa Matsumoto | 1994-04-05 |
| 5239556 | Demodulation system for spread spectrum communication | Takahisa Matsumoto | 1993-08-24 |
| 5170411 | Modulation and demodulation system for spread spectrum transmission | — | 1992-12-08 |
| 4977578 | Spread spectrum communication system | Kenichi Mizuno | 1990-12-11 |
| 4953178 | Spread spectrum communication system | — | 1990-08-28 |
| 4943976 | Spread spectrum communication system | — | 1990-07-24 |
| 4888564 | Phase-locked loop circuit | — | 1989-12-19 |
| 4790009 | Scrambler system | Katsuhiro Onuki, Fumio Kawabata | 1988-12-06 |
| 4698693 | Audio magnetic recording and/or reproducing apparatus utilizing frequency modulation | Yasuomi Namiki, Hisashige Fujiwara, Kazutoshi Hirohashi | 1987-10-06 |
| 4635004 | Single-sideband generator suitable for integrated circuits | — | 1987-01-06 |
| 4626788 | Circuit for reconstructing noise-affected signals | — | 1986-12-02 |
| 4614910 | Quarternary differential PSK demodulator | Kazutoshi Hirohashi | 1986-09-30 |
| 4577161 | Noise reduction by linear interpolation using a dual function amplifier circuit | Kazutoshi Hirohashi, Yasuomi Namiki | 1986-03-18 |
| 4574390 | Noise reduction for stereophonic FM signals by high-speed sampling and linear interpolation | Kazutoshi Hirohashi | 1986-03-04 |
| 4539527 | Noise reduction by linear interpolation using a dual function amplifier circuit | Kazutoshi Hirohashi | 1985-09-03 |
| 4532475 | Impulse noise reduction by linear interpolation having a deemphasis characteristic | Kazutoshi Hirohashi | 1985-07-30 |
| 4531095 | Impulse noise reduction by linear interpolation having immunity to white noise | Kazutoshi Hirohashi | 1985-07-23 |
| 4517518 | Circuit arrangement for reconstructing noise-affected signals | — | 1985-05-14 |
| 4495428 | Circuit arrangement for deriving a level control signal using silicon diodes | — | 1985-01-22 |