Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4784451 | Waveguide optical switches | Hitoshi Nakamura, Tadashi Fukuzawa, Koji Ishida, Kenji Hiruma, Hiroaki Inoue | 1988-11-15 |
| 4775980 | Distributed-feedback semiconductor laser device | Naoki Chinone, Shinji Tsuji, Yoshihisa Fujisaki, Yasutoshi Kashiwada, Motohisa Hirao +4 more | 1988-10-04 |
| 4695122 | Optical thin film waveguide | Koji Ishida | 1987-09-22 |