Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8045746 | Speaker device | Koji Takayama, Hiroyuki Kobayashi, Shinichi Hayasaka | 2011-10-25 |
| 7706560 | Speaker apparatus | Koji Takayama, Hiroyuki Kobayashi, Shinichi Hayasaka | 2010-04-27 |