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, Kazuo Honda | 1989-05-02 |
| 4800321 | High pressure sodium lamp | Yujiro Ike, Akihiro Yonezawa, Shinichi Ooshima, Yoshio Hirose | 1989-01-24 |