Issued Patents All Time
Showing 1–6 of 6 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6480642 | Hybrid optical waveguide circuit chip, and method for predicting the characteristics thereof | Hiroshi Kawashima, Hiroyuki Koshi, Shiro Nakamura | 2002-11-12 |
| 5649037 | Optical waveguide component and a light signal processing method using the same | Shiro Nakamura, Takeo Shimizu, Hisaharu Yanagawa, Hideyuki Iwata | 1997-07-15 |
| 5529595 | Method of positioning elements of an optical integrated circuit | Ken Ueki, Takeo Shimizu, Shiro Nakamura, Hisaharu Yanagawa | 1996-06-25 |
| 5396569 | Optical line monitoring method and an apparatus permitting simultaneous line monitoring and information communication | Hisaharu Yanagawa, Takeo Shimizu, Shiro Nakamura, Izumi Sankawa | 1995-03-07 |
| 5214725 | Optical coupler/splitter with a filter | Hisaharu Yanagawa, Takeo Shimizu, Shiro Nakamura | 1993-05-25 |
| 4257286 | Precision driving apparatus | — | 1981-03-24 |