Issued Patents All Time
Showing 26–41 of 41 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4861130 | Optical modulating device utilizing polariton substance | Hiroyoshi Matsumura, Hiroaki Inoue, Tadashi Fukuzawa, Naoki Chinone | 1989-08-29 |
| 4840446 | Photo semiconductor device having a multi-quantum well structure | Hitoshi Nakamura, Shinji Sakano, Hiroaki Inoue, Hiroyoshi Matsumura | 1989-06-20 |
| 4838633 | Semiconductor device with high speed signal transmission arrangement utilizing light | Hiroyoshi Matsumura | 1989-06-13 |
| 4828592 | Polarization plane maintaining optical fiber fabricating method | Hiroyoshi Matsumura, Tsuneo Suganuma | 1989-05-09 |
| 4813757 | Optical switch including bypass waveguide | Shinji Sakano, Hiroaki Inoue, Hiroyoshi Matsumura, Hitoshi Nakamura, Naoki Chinone | 1989-03-21 |
| 4730896 | Member for infrared ray transmission | Hiroyoshi Matsumura | 1988-03-15 |
| 4612294 | Glass material for optical fibers used in infrared region | Shin Satoh, Hiroyoshi Matsumura | 1986-09-16 |
| 4604577 | Temperature-compensated magnetic field measuring instrument | Hiroyoshi Matsumura, Norio Ohta, Tsuneo Suganuma, Kazuyuki Nagatsuma, Yutaka Sugita | 1986-08-05 |
| 4570064 | Optical D.C. electric-field measuring apparatus with optic sensing means exhibiting both electrooptic and photoelectric effects | Kazuyuki Nagatsuma, Hiroyoshi Matsumura, Tsuneo Suganuma | 1986-02-11 |
| 4505729 | Method of producing optical fiber preform | Hiroyoshi Matsumura, Tsuneo Suganuma | 1985-03-19 |
| 4483617 | Optical gyroscope with large propagation constant difference | Hiroyoshi Matsumura, Tsuneo Suganuma | 1984-11-20 |
| 4426129 | Optical fiber and method of producing the same | Hiroyoshi Matsumura, Tsuneo Suganuma | 1984-01-17 |
| 4406518 | Single-mode-transmission optical fiber and a method of manufacturing the same | Hiroyoshi Matsumura, Tsuneo Suganuma | 1983-09-27 |
| 4323381 | Method for producing mother rods for optical fibers | Iwao Matsuyama, Kenzo Susa, Tsuneo Suganuma, Shin Satoh, Hidehito Obayashi | 1982-04-06 |
| 4206968 | Optical fiber and method for producing the same | Tsuneo Suganuma, Gyozo Toda, Koji Ishida, Shin Satoh, Mamoru Sugie | 1980-06-10 |
| 4203743 | Method of producing optical fiber | Tsuneo Suganuma, Koji Ishida, Shin Satoh, Mamoru Sugie, Gyozo Toda | 1980-05-20 |