Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4477699 | Mechanical two-way loudspeaker | Yasumitsu Wada | 1984-10-16 |
| 4472834 | Loudspeaker system | Kunihiko Shimada | 1984-09-18 |
| 4351412 | Diaphragm for acoustic instruments and method of manufacturing the same | Tsunehiro Tsukagoshi | 1982-09-28 |