Issued Patents All Time
Showing 1–10 of 10 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6172978 | Tandem relay device | Wataru Fushimi, Yoshihiko Shirokura, Yukimasa Sugino, Hideaki Ebisawa | 2001-01-09 |
| 6147973 | Signal discrimination apparatus, a method for discriminating a signal, and a signal transmitting apparatus for voiceband signals | Yukimasa Sugino, Hideaki Ebisawa, Nobuyoshi Horie | 2000-11-14 |
| 5873058 | Voice coding-and-transmission system with silent period elimination | Hisashi Yajima, Noriaki Kawano, Shigeaki Suzuki | 1999-02-16 |
| 5694517 | Signal discrimination circuit for determining the type of signal transmitted via a telephone network | Yukimasa Sugino | 1997-12-02 |
| 5533121 | Echo canceller and method for controlling echo cancellation | Shigeaki Suzuki | 1996-07-02 |
| 5280561 | Method for processing audio signals in a sub-band coding system | Mihoko Satoh, Hideaki Ebisawa | 1994-01-18 |
| 5159638 | Speech detector with improved line-fault immunity | Kazuo Saito | 1992-10-27 |
| 5121349 | Digital noise generator | — | 1992-06-09 |
| 4972411 | Signalling transmission system | Wataru Fushimi, Noriaki Kawano | 1990-11-20 |
| 4821227 | Plesiochronous matching apparatus | — | 1989-04-11 |