Issued Patents All Time
Showing 1–7 of 7 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6134372 | Light intensity attenuator and attenuating method | Junichiro Ichikawa, Hirotoshi Nagata, Kaoru Higuma, Takaaki Ogata, Yasuhisa Taneda | 2000-10-17 |
| 5982958 | Optical waveguide modulator device | Tohru Sugamata, Shinichi Shimotsu | 1999-11-09 |
| 5526448 | Optical waveguide modulator having a reduced D.C. drift | Hirotoshi Nagata, Manabu Yamada, Junichiro Ichikawa, Jamshid Nayyer, Shinichi Shimotsu +6 more | 1996-06-11 |
| 4413179 | Mechanical vibrator for light beam chopper | Shoji Matsuoka, Ikutaro Kobayashi | 1983-11-01 |
| 4405405 | Blazed diffraction grating structures and method of manufacturing the same | Yohji Fujii | 1983-09-20 |
| 4330175 | Blazed diffraction grating structures and method of manufacturing the same | Yohji Fujii | 1982-05-18 |
| 4322126 | Mechanical optical switching devices | Yohji Fujii, Tsutomu Aoyama, Kikuo Doi | 1982-03-30 |