Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7324834 | Speaker system | Takuro Yamaguchi, Yoshio Koike, Yuichi Sakamoto | 2008-01-29 |
| 6516077 | Electroacoustic transducer | Fumihiko Yamaguchi | 2003-02-04 |
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7324834 | Speaker system | Takuro Yamaguchi, Yoshio Koike, Yuichi Sakamoto | 2008-01-29 |
| 6516077 | Electroacoustic transducer | Fumihiko Yamaguchi | 2003-02-04 |