Issued Patents All Time
Showing 1–5 of 5 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| D497148 | Digital video disc recorder | Toshiyuki Sonoda | 2004-10-12 |
| D324389 | Loudspeaker | — | 1992-03-03 |
| 4993511 | Speaker | Takayuki Hiraki, Hideaki Kurata, Eiji Shintani | 1991-02-19 |
| D289894 | Speaker grille | Tetsuo Ohtsuji | 1987-05-19 |
| D289282 | Speaker grille | Tetsuo Ohtsuji | 1987-04-14 |