Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6984887 | Heatsink arrangement for semiconductor device | Norio Umezu, Sadatoshi Hisamoto | 2006-01-10 |
| 6765449 | Pulse width modulation circuit | Sadatoshi Hisamoto, Norio Umezu, Yoshitaka Handa, Shuichi HIZA | 2004-07-20 |