Issued Patents All Time
Showing 51–75 of 83 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6566691 | Semiconductor device with trench gate having structure to promote conductivity modulation | Tomoki Inoue, Koichi Sugiyama, Hideaki Ninomiya | 2003-05-20 |
| 6534998 | Semiconductor device and control method thereof | Ichiro Omura, Wolfgang Fichtner, Hiromichi Ohashi, Hideaki Ninomiya | 2003-03-18 |
| 6323717 | Semiconductor device, drive method, and drive apparatus | Ichiro Omura, Suzuo Saito, Hiromichi Ohashi, Tomokazu Domon, Koichi Sugiyama +1 more | 2001-11-27 |
| 6268990 | Semiconductor protection device and power converting system | Kimihiro Hoshi | 2001-07-31 |
| 6153896 | Semiconductor device and control method thereof | Ichiro Omura, Wolfgang Fichtner, Hiromichi Ohashi, Hideaki Ninomiya | 2000-11-28 |
| 6114727 | Semiconductor device | Masakazu Yamaguchi | 2000-09-05 |
| 5994739 | Integrated circuit device | Akio Nakagawa | 1999-11-30 |
| 5960286 | Method of manufacturing power semiconductor devices | Yoshihiro Minami, Shigeru Hasegawa, Hiroshi Takenaka, Shinji Sato | 1999-09-28 |
| 5883402 | Semiconductor device and protection method | Ichiro Omura, Kenichi Matsushita, Hideaki Ninomiya | 1999-03-16 |
| 5714782 | Composite integrated circuit device | Akio Nakagawa | 1998-02-03 |
| 5688702 | Process of making a semiconductor device using a silicon-on-insulator substrate | Akio Nakagawa, Kazuyoshi Furukawa, Katsujiro Tanzawa | 1997-11-18 |
| 5477065 | Lateral thin film thyristor with bevel | Akio Nakagawa | 1995-12-19 |
| 5463231 | Method of operating thyristor with insulated gates | Kiminori Watanabe, Akio Nakagawa, Yoshihiro Yamaguchi, Norio Yasuhara, Tomoko Matsudai +2 more | 1995-10-31 |
| 5428228 | Method of operating thyristor with insulated gates | Kiminori Watanabe, Akio Nakagawa, Yoshihiro Yamaguchi, Norio Yasuhara, Tomoko Matsudai +2 more | 1995-06-27 |
| 5332920 | Dielectrically isolated high and low voltage substrate regions | Akio Nakagawa, Kazuyoshi Furukawa, Katsujiro Tanzawa | 1994-07-26 |
| 5315134 | Thyristor with insulated gate | Kiminori Watanabe, Akio Nakagawa, Yoshihiro Yamaguchi, Norio Yasuhara, Tomoko Matsudai | 1994-05-24 |
| 5223442 | Method of making a semiconductor device of a high withstand voltage | Mitsuhiko Kitagawa, Yoshio Yokota, Kazuo Watanuki, Yoshinari Uetake, Kazunobu Nishitani | 1993-06-29 |
| 5159427 | Semiconductor substrate structure for use in power IC device | Akio Nakagawa | 1992-10-27 |
| 5156981 | Method of making a semiconductor device of a high withstand voltage | Mitsuhiko Kitagawa, Yoshio Yokota, Kazuo Watanuki, Yoshinari Uetake, Kazunobu Nishitani | 1992-10-20 |
| 5144401 | Turn-on/off driving technique for insulated gate thyristor | Akio Nakagawa | 1992-09-01 |
| 5132767 | Double gate GTO thyristor | Katsuhiko Takigami, Akio Nakagama, Tomokazu Domon | 1992-07-21 |
| 5097314 | Dielectrically isolated substrate with isolated high and low breakdown voltage elements | Akio Nakagawa, Kazuyoshi Furukawa, Katsujiro Tanzawa | 1992-03-17 |
| 5072287 | Semiconductor device and method of manufacturing the same | Akio Nakagawa, Kazuyoshi Furukawa | 1991-12-10 |
| 5049968 | Dielectrically isolated substrate and semiconductor device using the same | Akio Nakagawa, Kazuyoshi Furukawa, Katsujiro Tanzawa | 1991-09-17 |
| 5028974 | Semiconductor switching device with anode shortening structure | Mituhiko Kitagawa, Hiromichi Ohashi, Yoshinari Uetake, Yoshio Yokota, Kazuo Watanuki | 1991-07-02 |