Issued Patents 2003
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6643431 | Optical device and control method thereof | Hitoshi Hatayama, Masayuki Nishimura, Makoto Katayama | 2003-11-04 |
| 6560381 | Optical filter | Hitoshi Hatayama, Masayuki Nishimura | 2003-05-06 |