Issued Patents 1989
Showing 1–6 of 6 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4836888 | Method of chemically etching semiconductor substrate | Ryuta Hirayama | 1989-06-06 |
| 4828644 | Etching device for semiconductor wafers | Masahi Nakamura | 1989-05-09 |
| 4829534 | Semiconductor laser device having a semiconductor region for creating a depletion layer in a laser active layer for controlling current flow therethrough | Seiichi Miyazawa, Toshitami Hara, Akira Shimizu, Yoshinobu Sekiguchi, Isao Hakamada | 1989-05-09 |
| 4815027 | Optical operation apparatus for effecting parallel signal processing by detecting light transmitted through a filter in the form of a matrix | Jun Tokumitsu, Kenji Saito, Yuichi Handa, Nobuyoshi Tanaka | 1989-03-21 |
| 4799229 | Semiconductor laser array | Seiichi Miyazawa, Toshitami Hara, Yoshinobu Sekiguchi, Mitsutoshi Hasegawa, Sotomitsu Ikeda | 1989-01-17 |
| 4796067 | Semiconductor device having a superlattice structure | Akira Shimizu, Toshitami Hara, Isao Hakamada, Seiichi Miyazawa, Yoshinobu Sekiguchi | 1989-01-03 |