Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7209704 | Wireless headphone apparatus and wireless headphone system | Tetsuya Tsuruoka | 2007-04-24 |
| 6845308 | On-vehicle audio video control device | Wataru Tanaka, Toshiyuki Yasuhara | 2005-01-18 |