Issued Patents All Time
Showing 1–20 of 20 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7329909 | Nitride semiconductor device | Wataru Saito, Ichiro Omura | 2008-02-12 |
| 7038250 | Semiconductor device suited for a high frequency amplifier | Toru Sugiyama, Tetsuro Nozu | 2006-05-02 |
| 6940157 | High frequency semiconductor module, high frequency semiconductor device and manufacturing method for the same | Toru Sugiyama, Masayuki Sugiura, Yasuhiko Kuriyama, Yoshikazu Tanabe | 2005-09-06 |
| 6790694 | High frequency semiconductor module, high frequency semiconductor device and manufacturing method for the same | Toru Sugiyama, Masayuki Sugiura, Yasuhiko Kuriyama, Yoshikazu Tanabe | 2004-09-14 |
| 6448859 | High frequency power amplifier having a bipolar transistor | — | 2002-09-10 |
| 6344775 | Semiconductor device | Yasuhiko Kuriyama | 2002-02-05 |
| 6127716 | Heterojunction bipolar transistor and manufacturing method thereof | Masayuki Sugiura | 2000-10-03 |
| 6051484 | Semiconductor device and method of manufacturing thereof | — | 2000-04-18 |
| 5930133 | Rectifying device for achieving a high power efficiency | — | 1999-07-27 |
| 5898909 | Ultra high frequency radio communication apparatus | Kunio Yoshihara, Mitsuo Konno, Yasuo Ashizawa, Junko Akagi, Yasuhiro Kuriyama +6 more | 1999-04-27 |
| 5898200 | Microwave integrated circuit | Toru Sugiyama | 1999-04-27 |
| 5637909 | Semiconductor device and method of manufacturing the same | Hiroomi Nakajima, Yasuhiro Katsumata, Hiroshi Iwai, Toshihiko Iinuma, Kazumi Inou +3 more | 1997-06-10 |
| 5510647 | Semiconductor device and method of manufacturing the same | Hiroomi Nakajima, Yasuhiro Katsumata, Hiroshi Iwai, Toshihiko Iinuma, Kazumi Inou +3 more | 1996-04-23 |
| 5331186 | Heterojunction bipolar transistor with base electrode having Schottky barrier contact to the emitter | — | 1994-07-19 |
| 5266818 | Compound semiconductor device having an emitter contact structure including an I.sub.nx Ga.sub.1 -.sub.x As graded-composition layer | Kunio Tsuda | 1993-11-30 |
| 5153692 | Semiconductor device | — | 1992-10-06 |
| 5124270 | Bipolar transistor having external base region | — | 1992-06-23 |
| 5053846 | Semiconductor bipolar device with phosphorus doping | — | 1991-10-01 |
| 4933732 | Heterojunction bipolar transistor | Riichi Katoh, Mamoru Kurata | 1990-06-12 |
| 4679305 | Method of manufacturing a heterojunction bipolar transistor having self-aligned emitter and base and selective isolation regions | — | 1987-07-14 |