Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5210657 | Optical attenuator apparatus without steep level variation | Hiroshi Komazawa, Fuminobu Ito, Yuuichi Watanabe, Yoshiharu Sasaki | 1993-05-11 |
| 4643572 | Driving circuit of a grating | Youji Sonobe, Youichi Tamura | 1987-02-17 |