Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7233675 | Method of forming an electret condenser microphone | Tooru Himori | 2007-06-19 |
| 7062052 | Electret condenser microphone and method of producing same | Tooru Himori | 2006-06-13 |
| 5210792 | Ear-hang type headset | — | 1993-05-11 |