Issued Patents All Time
Showing 1–25 of 36 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 10020982 | Failure isolation method and management server for failure isolation | Atsushi Iwamura, Yoshiko Yasuda, Hideaki Ishii, Atsushi Komatsuzawa | 2018-07-10 |
| 8712255 | Optical receiver and optical transfer apparatus | Hiroshi Takeuchi, Kohei Mandai, Koji Takatori, Yasuyuki Fukashiro | 2014-04-29 |
| 7447430 | Optical cross connect apparatus and optical transmission system | Yoshio Nogi, Tomohiro Mori, Yasuyuki Fukashiro | 2008-11-04 |
| 7356257 | Optical switching apparatus and optical communication network system | Shigeki Kitajima, Sunao Kakizaki, Yasuyuki Fukashiro | 2008-04-08 |
| 7302176 | Optical network | Shinji Sakano, Yasushi Sawada, Yoshiaki Ikoma | 2007-11-27 |
| 7206475 | Optical switching apparatus, optical transmission system and method of setting up for optical signal route | Sunao Kakizaki, Shigeki Kitajima, Yasuyuki Fukashiro, Takashi Mori | 2007-04-17 |
| 7194205 | Optical transmission apparatus and optical systems | Shigeki Kitajima, Yasushi Sawada | 2007-03-20 |
| 6975811 | Optical one-to-one protection switching apparatus | Sunao Kakizaki, Takashi Mori, Masahiro Takatori, Yukio Hayashi, Shinichi Kuwano | 2005-12-13 |
| 6970614 | Optical switching equipment, optical transport network, and methods of using them | Yasuyuki Fukashiro | 2005-11-29 |
| 6933852 | Optical switching apparatus and optical communication network system | Shigeki Kitajima, Sunao Kakizaki, Yasuyuki Fukashiro | 2005-08-23 |
| 6839480 | Optical switching apparatus, optical transmission system and method of setting up for optical signal route | Sunao Kakizaki, Shigeki Kitajima, Yasuyuki Fukashiro, Takashi Mori | 2005-01-04 |
| 6778725 | Optical switching apparatus, optical transmission system and method of setting up for optical signal route | Sunao Kakizaki, Shigeki Kitajima, Yasuyuki Fukashiro, Takashi Mori | 2004-08-17 |
| 6731874 | Optical transmission apparatus and optical systems | Shigeki Kitajima, Yasushi Sawada | 2004-05-04 |
| 6577784 | Optical switch | Masaya Horino, Hisao Kurosawa, Masafumi Kokubo | 2003-06-10 |
| 6463191 | Optical switching device and optical switching method | Masahiro Ojima, Masaya Horino, Kazutaka Sato | 2002-10-08 |
| 6434286 | Optical signal switching apparatus | Yukio Hayashi, Sunao Kakizaki, Shinichi Kuwano | 2002-08-13 |
| 6424445 | Optical transmission apparatus and optical systems | Shigeki Kitajima, Yasushi Sawada | 2002-07-23 |
| 6341032 | Method and system for reducing optical surge | Yasuyuki Fukashiro, Yukio Hayashi | 2002-01-22 |
| 6334009 | Optical signal switching apparatus | Yasuyuki Fukashiro, Shinichi Kuwano, Kenji Yamahara, Yukio Hayashi | 2001-12-25 |
| 6304346 | Fault restoration control method and it's apparatus in a communication network | Yasushi Sawada, Shigeki Kitajima, Tatsuo Kanetake | 2001-10-16 |
| 6229932 | Optical signal switching apparatus | Yasuyuki Fukashiro, Shinichi Kuwano, Kenji Yamahara, Yukio Hayashi | 2001-05-08 |
| 5864414 | WDM network with control wavelength | Peter E. Barnsley, Alan McGuire | 1999-01-26 |
| 5600466 | Wavelength division optical signalling network apparatus and method | Peter E. Barnsley, Alan McGuire | 1997-02-04 |
| 5500756 | Optical fiber transmission system and supervision method of the same | Shinya Sasaki, Yukio Nakano, Hiroyuki Nakano, Ryoji Tateyari, Hironari Matsuda +9 more | 1996-03-19 |
| 5422968 | Optical demultiplexing system with optical amplifiers | Shoichi Hanatani, Hiroaki Inoue | 1995-06-06 |