Issued Patents All Time
Showing 151–154 of 154 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4832430 | Optical switch | Kunio Tada, Yoshitaka Okada, Hiroyoshi Matsumura | 1989-05-23 |
| 4813757 | Optical switch including bypass waveguide | Shinji Sakano, Hiroyoshi Matsumura, Hitoshi Nakamura, Toshio Katsuyama, Naoki Chinone | 1989-03-21 |
| 4792197 | Fabrication method and equipment for diffraction gratings | Shinji Tsuji, Hiroyoshi Matsumura, Akira Arimoto | 1988-12-20 |
| 4784451 | Waveguide optical switches | Hitoshi Nakamura, Tadashi Fukuzawa, Koji Ishida, Hiroyoshi Matumura, Kenji Hiruma | 1988-11-15 |