Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6718217 | Digital audio tone evaluating system | Hironobu Shinohara, Kiyohiro Horie, Tetsuo Fujihara | 2004-04-06 |
| 5226089 | Circuit and method for compensating low frequency band for use in a speaker | Sang-Lak Yoon | 1993-07-06 |
| 4300655 | Acoustic diaphragm for speakers and method of producing the same | Shuji Saiki, Kazue Sato, Kousaku Murata, Hiroshi Yamamoto | 1981-11-17 |