Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4831424 | Insulated gate semiconductor device with back-to-back diodes | Isao Yoshida, Takeaki Okabe, Kazutoshi Ashikawa, Tetsuo Iijima | 1989-05-16 |
| 4806250 | Liquid chromatography and apparatus using the same | Yoshinori Takata, Junkichi Miura | 1989-02-21 |