Issued Patents 2003
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6578661 | Speaker apparatus | Yoshio Ohashi | 2003-06-17 |
| 6570995 | Speaker device | Yoshio Ohashi | 2003-05-27 |
| 6554962 | Loudspeaker diaphragm | Kunihiko Tokura, Yoshio Ohashi, Satoshi Idemura, Michiya Nakashima, Katsuji Takahashi | 2003-04-29 |