Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6940991 | Damper for loudspeaker and method for manufacturing same | — | 2005-09-06 |
| 5796054 | Loudspeaker diaphragm | Kiyotaka Miyashita, Kouichi Ogawa, Akira Kose, Asa Kimura | 1998-08-18 |