Issued Patents 1989
Showing 1–14 of 14 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4872174 | Semiconductor laser device having a grating structure | Sadayoshi Matsui, Mototaka Taneya, Mitsuhiro Matsumoto, Hiroyuki Hosoba, Hiroaki Kudo | 1989-10-03 |
| 4862472 | Semiconductor laser device | Shinji Kaneiwa, Hiroaki Kudo, Chitose Sakane, Toshihiko Yoshida | 1989-08-29 |
| 4858215 | Integrated optical disc pickup that allows variations in the wavelength of the laser beam | Seiki Yano, Hiroaki Kudo, Toshiki Hijikata, Shinji Kaneiwa | 1989-08-15 |
| 4852116 | Semiconductor laser device | Shinji Kaneiwa, Hiroaki Kudo, Toshihiko Yoshida | 1989-07-25 |
| 4849985 | Distributed feedback semiconductor laser device | Toshihiko Yoshida, Shinji Kaneiwa, Hiroaki Kudo | 1989-07-18 |
| 4841534 | Buried type semiconductor laser device | Toshihiko Yoshida, Shinji Kaneiwa, Hiroaki Kudo, Sadayoshi Matsui | 1989-06-20 |
| 4839900 | Buried type semiconductor laser device | Toshihiko Yoshida, Shinji Kaneiwa, Hiroaki Kudo, Sadayoshi Matsui | 1989-06-13 |
| 4820019 | Optical device | Toshihiko Yoshida, Shinji Kaneiwa | 1989-04-11 |
| 4819240 | Light modulator | Shinji Kaneiwa, Toshihiko Yoshida, Sadayoshi Matsui | 1989-04-04 |
| 4806778 | Micro-displacement measuring apparatus using a semiconductor laser | Osamu Yamamoto, Hiroshi Hayashi, Sadayoshi Matsui, Nobuyuki Miyauchi | 1989-02-21 |
| 4806454 | Method for the formation of a diffraction grating | Toshihiko Yoshida, Shinji Kaneiwa, Sadayoshi Matsui | 1989-02-21 |
| 4805183 | Distributed feedback semiconductor laser device | Hiroaki Kudo, Shinji Kaneiwa, Toshihiko Yoshida | 1989-02-14 |
| 4803690 | Semiconductor laser | Shinji Kaneiwa, Toshihiko Yoshida, Sadayoshi Matsui | 1989-02-07 |
| 4799227 | Semiconductor laser device having a buried heterostructure | Shinji Kaneiwa, Toshihiko Yoshida, Sadayoshi Matsui | 1989-01-17 |