Issued Patents All Time
Showing 1–7 of 7 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6229631 | Signal transmission system and method for supervising the same | Hideaki Sato, Hidenari Maeda, Takashi Watanabe | 2001-05-08 |
| 5388001 | Polarization-independent optical wavelength filter with simplified structure | Hideaki Okayama, Masao Kobayashi | 1995-02-07 |
| 5163106 | Waveguide-type optical switch | Hideaki Okayama | 1992-11-10 |
| 5123069 | Waveguide-type optical switch | Hideaki Okayama, Toshimasa Ishida | 1992-06-16 |
| 5048906 | Waveguide type photoswitch with a short coupling region | Hideaki Okayama | 1991-09-17 |
| 4884858 | Distributed coupler switch | Takashi Ushikubo, Hideaki Okayama, Masato Kawahara | 1989-12-05 |
| 4846542 | Optical switch matrix | Hideaki Okayama, Akio Matoba, Nobuo Kobayashi, Kiyoshi Nagai, Ryoko Shibuya | 1989-07-11 |