Issued Patents All Time
Showing 1–6 of 6 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7228040 | Hole-assisted single mode optical fiber | Kazuhide NAKAJIMA, Katsusuke Tajima, Jian Zhou, Kazuo Hogari | 2007-06-05 |
| 5446810 | Optical switch, optical fiber arranging member and method of manufacturing the optical fiber arranging member | Tsutomu Watanabe, Kazuhito Saito, Kazumasa Ozawa, Shunichi Mizuno | 1995-08-29 |
| 5430824 | Optical fibre, waveguide, and optical active device | Yoshiki Chigusa, Masashi Onishi, Takashi Kohgo, Minoru Watanabe | 1995-07-04 |
| 5422975 | Optical filter doped with rare earth elements and used with optical fibers | Hiroo Kanamori, Akira Urano, Tomonori Kashiwara | 1995-06-06 |
| 5396569 | Optical line monitoring method and an apparatus permitting simultaneous line monitoring and information communication | Hisaharu Yanagawa, Takeo Shimizu, Shiro Nakamura, Isao Ohyama | 1995-03-07 |
| 5214728 | Light communication system | Masayuki Shigematsu, Kohji Nakazato | 1993-05-25 |