Issued Patents 1989
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4885753 | Semiconductor laser device of variable wavelength type | Makoto Okai, Kazuhisa Uomi, Shinji Sakano, Naoki Chinone | 1989-12-05 |
| 4873691 | Wavelength-tunable semiconductor laser | Kazuhisa Uomi, Shinji Sakano, Makoto Okai, Naoki Chinone | 1989-10-10 |
| 4841536 | Semiconductor laser devices | Aiko Ohishi, Motohisa Hirao, Naoki Chinone, Hitoshi Nakamura, Hiroyoshi Matsumura | 1989-06-20 |
| 4819036 | Semiconductor device | Takao Kuroda, Akiyoshi Watanabe, Akio Ohishi, Hiroyoshi Matsumura | 1989-04-04 |