Issued Patents All Time
Showing 1–6 of 6 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7386145 | Loudspeaker system, method and apparatus of manufacturing the same | Masahiko Kawahara, Yukio Sugimoto, Seiji Mori, Toshikazu Iwasaki | 2008-06-10 |
| 7050594 | Sound control unit and sound system | Tsuyoshi Nakada, Susumu Fujiwara, Noboru Kyouno | 2006-05-23 |
| 6899794 | Speaker device, and method and device for producing the same | Masahiko Kawahara, Yukio Sugimoto, Seiji Mori, Toshikazu Iwasaki | 2005-05-31 |
| 6371241 | Speaker device | Tsuyoshi Nakada, Seiji Mori, Toshikazu Iwasaki | 2002-04-16 |
| 5625699 | Speaker device | — | 1997-04-29 |
| 5619019 | Damper for loudspeaker | Takeshi Yoshimura, Koichi Morioka | 1997-04-08 |