Issued Patents All Time
Showing 1–5 of 5 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7454032 | Magnesium diaphragm, method of manufacturing the same, and speaker apparatus | Masatoshi Sato, Satoshi Hachiya, Kouichi Honma | 2008-11-18 |
| 7308750 | Method of manufacturing a magnesium diaphragm | Masatoshi Sato, Yoshimi Kudo, Yuichi Kasahara | 2007-12-18 |
| 7006652 | Speaker damper | Satoshi Hachiya | 2006-02-28 |
| 6814181 | Electrically conductive damper device for speaker | Yasuhisa Abe, Koji Matsumoto, Koji Takayama | 2004-11-09 |
| 6772855 | Damper for speaker and method of producing the same | Masatoshi Sato, Satoshi Hachiya | 2004-08-10 |