Issued Patents 1989
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4835581 | Electron gas hole gas tunneling transistor device | Akiyoshi Watanabe, Takao Miyazaki, Hiroyoshi Matsumura | 1989-05-30 |
| 4819036 | Semiconductor device | Akiyoshi Watanabe, Shinji Tsuji, Akio Ohishi, Hiroyoshi Matsumura | 1989-04-04 |
| 4814838 | Semiconductor device and method of manufacturing the same | Akiyoshi Watanabe, Takao Miyazaki, Hiroyoshi Matsumura | 1989-03-21 |