Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7233675 | Method of forming an electret condenser microphone | Kazuhiko Kajihara | 2007-06-19 |
| 7062052 | Electret condenser microphone and method of producing same | Kazuhiko Kajihara | 2006-06-13 |
| 7031480 | Electret condenser microphone | Yoshinobu Yasuno | 2006-04-18 |
| 6512833 | Electret condenser microphone and method of producing same | Yoshinobu Yasuno | 2003-01-28 |