Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4395597 | Speaker diaphragm assembly and a method of manufacturing the same | Kiyoaki Suzuki, Masaru Watanabe, Hisashi Yamamoto, Tomoharu Hayashi | 1983-07-26 |
| 4384174 | Moving voice coil loudspeaker, peripheral diaphragm support, diaphragm construction, bobbin to diaphragm reinforcement | Kiyoaki Suzuki, Masaru Watanabe, Hisashi Yamamoto, Tomoharu Hayashi | 1983-05-17 |