Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7130441 | Speaker system having processing circuitry | Akira Nishikawa, Hiroshi Kowaki, Hiroyuki Yoshii | 2006-10-31 |
| 7082208 | Speaker assembly having plural drivers | Akira Nishikawa, Hiroshi Kowaki, Hiroyuki Yoshii | 2006-07-25 |
| 6751330 | Speaker system | Hiroshi Kowaki, Akira Nishikawa, Hiroyuki Yoshii | 2004-06-15 |
| 6724909 | Speaker apparatus | Akira Nishikawa, Hiroshi Kowaki, Hiroyuki Yoshii | 2004-04-20 |