Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6226460 | Movable filter device | Masayuki Hino | 2001-05-01 |
| 5200939 | Optical head apparatus including a waveguide layer with concentric or spiral periodic structure | Seiji Nishiwaki, Yoshinao Taketomi, Shinji Uchida, Junichi Asada | 1993-04-06 |
| 5193130 | Light deflecting device | Seiji Nishiwaki, Yoshinao Taketomi, Shinji Uchida, Junichi Asada | 1993-03-09 |
| 4991919 | Optical head apparatus including concentric, periodic grating in a waveguide | Seiji Nishiwaki, Yoshinao Taketomi, Shinji Uchida, Taketoshi Yonezawa, Sadao Mizuno | 1991-02-12 |