Issued Patents 2002
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6414861 | DC-DC converter | Tadahiko Matsumoto, Takayoshi Nishiyama, Hitoshi Tsuji | 2002-07-02 |
| 6380836 | Coil device and switching power supply apparatus using the same | Tadahiko Matsumoto | 2002-04-30 |