Issued Patents 2002
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6479878 | Semiconductor device and semiconductor electret condenser microphone | Shigeaki Okawa, Toshiyuki Ohkoda, Yoshiaki Ohbayashi, Shinichi Saeki, Shuji Osawa | 2002-11-12 |
| 6420203 | Method of producing semiconductor electret condenser microphone | Shigeaki Okawa, Toshiyuki Ohkoda, Yoshiaki Ohbayashi, Shinichi Saeki, Shuji Osawa | 2002-07-16 |
| 6417560 | Semiconductor device | Shigeaki Okawa, Toshiyuki Ohkoda, Yoshiaki Ohbayashi, Shinichi Saeki, Shuji Osawa | 2002-07-09 |