Issued Patents 1989
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4870429 | Optical foam-spacer disk assembly | Yoshiaki Togawa, Seimei Yasui, Toshitsugu Kikuchi | 1989-09-26 |
| 4826780 | Method of making bipolar transistors | Toyoki Takemoto, Tadao Komeda, Haruyasu Yamada | 1989-05-02 |
| 4819311 | Machine tool | Hitoshi Hashimoto, Eiji Ryukawa, Hideo Kodachi | 1989-04-11 |