Issued Patents 2002
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6469727 | Optical quantity measuring method and optical quantity measuring apparatus using same | Kenichi Wada, Tomohiko Masuda | 2002-10-22 |
| 6441941 | Light shutter device | Isao Doi, Itaru Saito, Tomohiko Masuda, Tsukasa Yagi, Ken Matsubara | 2002-08-27 |
| 6347894 | Light shutter device | Tsukasa Yagi, Isao Doi | 2002-02-19 |