Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7224217 | Switching amplifier | Kazuhiro Hida, Joji Kasai, Sou Fujioka, Mamoru Sekiya | 2007-05-29 |
| 6765449 | Pulse width modulation circuit | Kazutaka Murayama, Sadatoshi Hisamoto, Norio Umezu, Shuichi HIZA | 2004-07-20 |