Issued Patents 2004
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6728495 | Light output control circuit with a warning function of deteriorated light output | Makoto Miki, Toshiyuki Takauji, Toru Matsuyama, Tadashi Ikeuchi, Tadao Inoue +1 more | 2004-04-27 |