Issued Patents 2004
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6774566 | High pressure discharge lamp and luminaire | Seiji Ashida | 2004-08-10 |
| 6713961 | High-intensity discharge lamp, system for lighting the lamp and lighting appliance using the lamp | Sadao Sakaguchi, Seiji Ashida, Shigehisa Kawatburu, Kazuhiro Miyagawa | 2004-03-30 |