Issued Patents All Time
Showing 1–5 of 5 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 11910570 | Heat sink structure for audio equipment | — | 2024-02-20 |
| 11516578 | Plate member of acoustic equipment | Kayo Takamatsu | 2022-11-29 |
| 8090138 | Audio devices for vehicles | Kouichi Toyama, Kiyoshi Ootani, Akira Nishikawa, Yuichi Nakajima | 2012-01-03 |
| 7907742 | Exciter for directly vibrating board and speaker apparatus used the same | Yuichi Nakajima, Kiyoshi Ootani, Akira Nishikawa | 2011-03-15 |
| 7030522 | Exciter for directly vibrating board | Yuichi Nakajima, Kiyoshi Ohtani, Akira Nishikawa | 2006-04-18 |