Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5638266 | Free wheel diode arrangement for neutral point clamped electric power conversion apparatus | Akira Horie, Syuuji Saitou | 1997-06-10 |
| 4864385 | Power semiconductors connected antiparallel via heatsinks | Yoshinori Usui, Takashi Tsuboi | 1989-09-05 |
| 4694323 | Apparatus for vapor-cooling a semiconductor | Yoshinori Usui | 1987-09-15 |
| 4492975 | Gate turn-off thyristor stack | Yukio Yamada, Hisashi Kuwana | 1985-01-08 |