Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6378649 | Speaker member and manufacturing method thereof | Toshihide Inoue, Yushi Ono, Kazumasa Takemura, Hiroyasu Kumo | 2002-04-30 |
| 4377617 | Loudspeaker diaphragm and process for producing same | Akira Ikei, Motoharu Akahama, Tokisuke Wada | 1983-03-22 |