Issued Patents 2004
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6815894 | Mercury-free arc tube for discharge lamp unit | Michio Takagaki | 2004-11-09 |
| 6750612 | Mercury-free arc tube for discharge lamp unit | Michio Takagaki, Masaya Shido, Takeshi Fukuyo | 2004-06-15 |
| 6707239 | Arc tube including step-down plane portions in pinch seal area | Akihiro Nagata, Hiroshi Goto, Yoshitaka Ohshima | 2004-03-16 |
| 6672923 | Method of manufacturing arc tube | Nobuo Ohkawai, Yoshitaka Ohshima, Akihiro Nagata | 2004-01-06 |