Issued Patents 2004
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6815894 | Mercury-free arc tube for discharge lamp unit | Shinichi Irisawa | 2004-11-09 |
| 6750612 | Mercury-free arc tube for discharge lamp unit | Masaya Shido, Shinichi Irisawa, Takeshi Fukuyo | 2004-06-15 |