Issued Patents 1997
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5642463 | Stereophonic voice recording and playback device | Yasumoto Murata | 1997-06-24 |
| 5633633 | Codec apparatus | — | 1997-05-27 |
| 5600755 | Voice codec apparatus | Syuuichi Yoshikawa | 1997-02-04 |