Issued Patents All Time
Showing 1–6 of 6 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5223442 | Method of making a semiconductor device of a high withstand voltage | Mitsuhiko Kitagawa, Yoshio Yokota, Kazuo Watanuki, Kazunobu Nishitani, Tsuneo Ogura | 1993-06-29 |
| 5156981 | Method of making a semiconductor device of a high withstand voltage | Mitsuhiko Kitagawa, Yoshio Yokota, Kazuo Watanuki, Kazunobu Nishitani, Tsuneo Ogura | 1992-10-20 |
| 5028974 | Semiconductor switching device with anode shortening structure | Mituhiko Kitagawa, Tsuneo Ogura, Hiromichi Ohashi, Yoshio Yokota, Kazuo Watanuki | 1991-07-02 |
| 4958215 | Press-contact flat type semiconductor device | Shinjiro Kojima, Hideo Matsuda, Masami Iwasaki | 1990-09-18 |
| 4882612 | Power semiconductor device | Yasunori Usui, Hiroshi Okamura, Takashi Fujiwara | 1989-11-21 |
| 4618877 | Power semiconductor device with mesa type structure | Youichi Araki | 1986-10-21 |