Issued Patents 1989
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4837526 | Semiconductor external optical modulator | Masatoshi Suzuki, Yukitoshi Kushiro, Shigeyuki Akiba | 1989-06-06 |
| 4820655 | Method for manufacturing semiconductor optical integrated device with optical waveguide regions | Masatoshi Suzuki, Yukitoshi Kushiro, Shigeyuki Akiba | 1989-04-11 |
| 4811353 | Semiconductor optical modulator | Masatoshi Suzuki, Yukitoshi Kushiro, Shigeyuki Akiba | 1989-03-07 |
| 4796274 | Semiconductor device with distributed bragg reflector | Shigeyuki Akiba, Masashi Usami, Masatoshi Suzuki | 1989-01-03 |