Issued Patents 1989
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4888784 | Semiconductor laser device | — | 1989-12-19 |
| 4833687 | Distributed feedback semiconductor laser | — | 1989-05-23 |
| 4807245 | Distributed-feedback type semiconductor laser | Kazuo Honda | 1989-02-21 |