Issued Patents All Time
Showing 26–43 of 43 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 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 |
| 4792197 | Fabrication method and equipment for diffraction gratings | Hiroaki Inoue, Shinji Tsuji, Akira Arimoto | 1988-12-20 |
| 4766092 | Method of growing heteroepitaxial InP on Si using Sn substrate implantation | Takao Kuroda, Kenji Hiruma | 1988-08-23 |
| 4737003 | Optical switching device utilizing multiple quantum well structures between intersecting waveguides | Naoki Chinone, Koji Ishida | 1988-04-12 |
| 4737015 | Optical waveguide having a silicon oxi-nitride layer | Koji Ishida, Kenji Hiruma, Kazuyuki Nagatsuma, Akihito Hongo | 1988-04-12 |
| 4730896 | Member for infrared ray transmission | Toshio Katsuyama | 1988-03-15 |
| 4720836 | Distributed feedback semiconductor laser | Tadashi Fukuzawa, Shinji Tsuji, Hitoshi Nakamura, Kenji Hiruma | 1988-01-19 |
| 4693543 | Optical integrated circuit | Koji Ishida | 1987-09-15 |
| 4631402 | Optical electric-field measuring apparatus | Kazuyuki Nagatsuma, Kazumasa Takagi | 1986-12-23 |
| 4612294 | Glass material for optical fibers used in infrared region | Toshio Katsuyama, Shin Satoh | 1986-09-16 |
| 4604577 | Temperature-compensated magnetic field measuring instrument | Toshio Katsuyama, Norio Ohta, Tsuneo Suganuma, Kazuyuki Nagatsuma, Yutaka Sugita | 1986-08-05 |
| 4581579 | Optical magnetic-field measuring apparatus having improved temperature characteristics | Kazuyuki Nagatsuma, Tsuneo Suganuma, Norio Ohta, Keikichi Ando, Yuzuru Hosoe +1 more | 1986-04-08 |
| 4570064 | Optical D.C. electric-field measuring apparatus with optic sensing means exhibiting both electrooptic and photoelectric effects | Kazuyuki Nagatsuma, Toshio Katsuyama, Tsuneo Suganuma | 1986-02-11 |
| 4505729 | Method of producing optical fiber preform | Toshio Katsuyama, Tsuneo Suganuma | 1985-03-19 |
| 4483617 | Optical gyroscope with large propagation constant difference | Toshio Katsuyama, Tsuneo Suganuma | 1984-11-20 |
| 4426129 | Optical fiber and method of producing the same | Toshio Katsuyama, Tsuneo Suganuma | 1984-01-17 |
| 4406518 | Single-mode-transmission optical fiber and a method of manufacturing the same | Toshio Katsuyama, Tsuneo Suganuma | 1983-09-27 |