Issued Patents 1989
Showing 1–13 of 13 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4887877 | Optical devices and optical integrated circuits | Hiroaki Inoue, Shinji Sakano, Hitoshi Nakamura, Toshio Katsuyama | 1989-12-19 |
| 4861130 | Optical modulating device utilizing polariton substance | Toshio Katsuyama, Hiroaki Inoue, Tadashi Fukuzawa, Naoki Chinone | 1989-08-29 |
| 4847573 | Optical modulator | Tadashi Fukuzawa, Eizaburo Yamada, Kenji Hiruma | 1989-07-11 |
| 4841536 | Semiconductor laser devices | Aiko Ohishi, Motohisa Hirao, Naoki Chinone, Shinji Tsuji, Hitoshi Nakamura | 1989-06-20 |
| 4840446 | Photo semiconductor device having a multi-quantum well structure | Hitoshi Nakamura, Shinji Sakano, Hiroaki Inoue, Toshio Katsuyama | 1989-06-20 |
| 4838633 | Semiconductor device with high speed signal transmission arrangement utilizing light | Toshio Katsuyama | 1989-06-13 |
| 4835581 | Electron gas hole gas tunneling transistor device | Takao Kuroda, Akiyoshi Watanabe, Takao Miyazaki | 1989-05-30 |
| 4832430 | Optical switch | Kunio Tada, Yoshitaka Okada, Hiroaki Inoue | 1989-05-23 |
| 4828592 | Polarization plane maintaining optical fiber fabricating method | Toshio Katsuyama, Tsuneo Suganuma | 1989-05-09 |
| 4819036 | Semiconductor device | Takao Kuroda, Akiyoshi Watanabe, Shinji Tsuji, Akio Ohishi | 1989-04-04 |
| 4814838 | Semiconductor device and method of manufacturing the same | Takao Kuroda, Akiyoshi Watanabe, Takao Miyazaki | 1989-03-21 |
| 4813757 | Optical switch including bypass waveguide | Shinji Sakano, Hiroaki Inoue, Hitoshi Nakamura, Toshio Katsuyama, Naoki Chinone | 1989-03-21 |
| 4803692 | Semiconductor laser devices | Shinji Sakano | 1989-02-07 |