Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4888783 | Semiconductor laser device | Keisuke Kojima, Kazuo Kyuma, Masaaki Kameya, Jun Ohta, Koichi Hammanaka | 1989-12-19 |
| 4847844 | Surface-emitting semiconductor laser device | Keisuke Kojima, Kazuo Kyuma | 1989-07-11 |