Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7929720 | Position detecting system, speaker system, and user terminal apparatus | Toshiaki Ishibashi, Takuya Tamaru | 2011-04-19 |
| 5572443 | Acoustic characteristic correction device | Tsugio Ito | 1996-11-05 |