Issued Patents 1994
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5329142 | Self turn-off insulated-gate power semiconductor device with injection-enhanced transistor structure | Mitsuhiko Kitagawa | 1994-07-12 |
| 5323041 | High-breakdown-voltage semiconductor element | Ken'ichi Matsushita, Akio Nakagawa | 1994-06-21 |
| 5298769 | GTO thyristor capable of preventing parasitic thyristors from being generated | Mitsuhiko Kitagawa | 1994-03-29 |