Issued Patents 2002
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6479878 | Semiconductor device and semiconductor electret condenser microphone | Shigeaki Okawa, Yoshiaki Ohbayashi, Mamoru Yasuda, Shinichi Saeki, Shuji Osawa | 2002-11-12 |
| 6420203 | Method of producing semiconductor electret condenser microphone | Shigeaki Okawa, Yoshiaki Ohbayashi, Mamoru Yasuda, Shinichi Saeki, Shuji Osawa | 2002-07-16 |
| 6417560 | Semiconductor device | Shigeaki Okawa, Yoshiaki Ohbayashi, Mamoru Yasuda, Shinichi Saeki, Shuji Osawa | 2002-07-09 |
| 6392307 | Semiconductor device | Shigeaki Okawa | 2002-05-21 |