Issued Patents All Time
Showing 1–11 of 11 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5923679 | Error correction encoder, error correction decoder, and communication system | Katsutoshi Itoh | 1999-07-13 |
| 5752223 | Code-excited linear predictive coder and decoder with conversion filter for converting stochastic and impulsive excitation signals | Hiromi Aoyagi, Yoshihiro Ariyama | 1998-05-12 |
| 5727122 | Code excitation linear predictive (CELP) encoder and decoder and code excitation linear predictive coding method | Hiromi Aoyagi, Hiroshi Katsuragawa, Yoshihiro Ariyama | 1998-03-10 |
| 5689511 | Data receiver for receiving code signals having a variable data rate | Yoshihito Shimazaki | 1997-11-18 |
| 5648921 | Digital operational circuit with pathmetrics calculating steps simplified | Satoru Araki, Yoshihito Shimazaki | 1997-07-15 |
| 4894820 | Double-talk detection in an echo canceller | Ryoichi Miyamoto, Yoshio Itoh, Yoshikazu Nakano, Mitsuo Tsujikado | 1990-01-16 |
| 4860315 | ADPCM encoding and decoding circuits | Shinji Kawaguchi, Atsushi Shinbo, Kiyoshi Yokota | 1989-08-22 |
| 4779225 | Adaptive digital filter | Atsushi Fukasawa, Ryoichi Miyamoto, Hiromi Ando, Shinji Kawaguchi | 1988-10-18 |
| 4692725 | Dielectric filter having trimmable capacitor | Atsushi Fukasawa, Takuro Sato, Tatumasa Yoshida | 1987-09-08 |
| 4660163 | Adaptive digital filter | Atsushi Fukasawa, Ryoichi Miyamoto, Hiromi Ando, Shinji Kawaguchi | 1987-04-21 |
| 4546333 | Dielectric filter | Atsushi Fukasawa, Takuro Sato, Tatumasa Yoshida | 1985-10-08 |