Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6751215 | Audio band signal transmission system and method | Toshiya Suganuma, Masao Aoki, Hidetoshi Fuse | 2004-06-15 |
| 6618479 | Echo canceler | Toshiya Suganuma | 2003-09-09 |
| 6343082 | Voice transmitting apparatus, a voice transmitting method, and a voice band signal transmitting system using the same apparatus or the same method | Hidetoshi Fuse, Masashi Hayano, Toshiya Suganuma | 2002-01-29 |
| 5694425 | Digital audio signal transmitting apparatus | Toshiya Suganuma, Toshiki Yagi | 1997-12-02 |