Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4827176 | Metal vapor discharge lamp with radioactively impregnated ceramic material body | Shinji Inukai, Akihiro Kamiya | 1989-05-02 |
| 4807245 | Distributed-feedback type semiconductor laser | Shoji Hirata | 1989-02-21 |