Issued Patents 2003
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6646389 | Discharge lamp ignition device, equipment and image forming apparatus | — | 2003-11-11 |
| 6638670 | Exposure mask and exposure method using the same | Toshihiko Sato, Jun Iwasaki, Masaki Ikegami, Masaharu Yokoyama | 2003-10-28 |
| 6515436 | Discharge lamp lighting apparatus and lighting appliance employing same | Yoshiaki Hara | 2003-02-04 |