Issued Patents All Time
Showing 1–5 of 5 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6236786 | Substrate with optical waveguide and method of making the same | Hikoharu Aoki, Takaaki Ushiki | 2001-05-22 |
| 5080486 | Spectrum measuring equipment utilizing double-image polarizing element | Masataka Shirasaki, Yukimitsu Watanabe, Rinichiro Yamamoto | 1992-01-14 |
| 4806442 | Spatial phase modulating masks and production processes thereof, and processes for the formation of phase-shifted diffraction gratings | Masataka Shirasaki | 1989-02-21 |
| 4730884 | Bipolar voltage controlled optical switch using intersecting waveguides | Minoru Seino, Ippei Sawaki, Hidehiro Mishiro | 1988-03-15 |
| 4637027 | Laser light source device | Masataka Shirasaki, Yasuo Furukawa, Takefumi Inagaki | 1987-01-13 |