Issued Patents All Time
Showing 1–9 of 9 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 9381724 | Energy conversion film | Hiroshi Koike, Seiichiro Iida, Hidekazu Kodama, Eiichi Fukada | 2016-07-05 |
| 7590252 | Heat-resistant electret condenser microphone | Katsuhiro Makihata, Hiroshi Ogura | 2009-09-15 |
| 7031480 | Electret condenser microphone | Tooru Himori | 2006-04-18 |
| 6999596 | Capacitor sensor | Masayoshi Hiramoto, Kazumoto Doi, Tatsuhiro Sawada | 2006-02-14 |
| 6731766 | Condenser microphone and production method thereof | Yasuhiro Riko | 2004-05-04 |
| 6512833 | Electret condenser microphone and method of producing same | Tooru Himori | 2003-01-28 |
| 6449370 | Digital electro-acoustic transducer | Yasuhiro Riko | 2002-09-10 |
| 6442194 | Digital telephone transmitter/receiver | Yasuhiro Riko | 2002-08-27 |
| 6125189 | Electroacoustic transducer of digital type | Yasuhiro Riko | 2000-09-26 |