Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7174024 | Flat acoustic conversion device | Takahisa Suzuki, Masashi Hori | 2007-02-06 |
| 5581053 | Diaphragm of electroacoustic transducer and method of manufacturing the same | Akihisa Suzuki, Yukimi Hiroshima | 1996-12-03 |
| 5347587 | Speaker driving device | Ryutaro Takahashi, Toru Hayase | 1994-09-13 |