Issued Patents All Time
Showing 1–13 of 13 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7924833 | Packet transfer unit | Kazuo Sugai, Takashi Kumagai | 2011-04-12 |
| 7522592 | Packet transfer unit | Kazuo Sugai, Takashi Kumagai | 2009-04-21 |
| 7379456 | Network routing apparatus | Takayuki Muranaka, Takeshi Furusawa, Tetsuya Nagata, Nobuhito Matsuyama | 2008-05-27 |
| 7272314 | Optical crossconnect apparatus and optical transmission system | Yasuyuki Fukashiro, Yukio Hayashi, Shigeki Kitajima, Masahiro Takatori, Shoichi Hanatani +1 more | 2007-09-18 |
| 7212526 | Method and apparatus for composing virtual links in a label switched network | — | 2007-05-01 |
| 6813445 | Optical crossconnect apparatus and optical transmission system | Yasuyuki Fukashiro, Yukio Hayashi, Shigeki Kitajima, Masahiro Takatori, Shoichi Hanatani +1 more | 2004-11-02 |
| 6643041 | Optical network | Hiroki Ikeda | 2003-11-04 |
| 6362905 | Optical crossconnect apparatus and optical transmission system | Yasuyuki Fukashiro, Yukio Hayashi, Shigeki Kitajima, Masahiro Takatori, Shoichi Hanatani +1 more | 2002-03-26 |
| 6317230 | Optical cross-connect system and optical transmission system | Shigeki Kitajima, Shoichi Hanatani, Hirohisa Sano | 2001-11-13 |
| 6304346 | Fault restoration control method and it's apparatus in a communication network | Yasushi Sawada, Hideaki Tsushima, Shigeki Kitajima | 2001-10-16 |
| 5710847 | Semiconductor optical functional device | Hideaki Takano, Hirohisa Sano, Masaki Ohira, Makoto Suzuki, Hiroaki Inoue | 1998-01-20 |
| 5351320 | Optical modulator depressing optical feedback and optical modulating element and channel optical waveguide used therefore | Masashi Kiguchi, Yoshio Taniguchi | 1994-09-27 |
| 5235449 | Polarizer with patterned diacetylene layer, method for producing the same, and liquid crystal display device including such polarizer | Shuji Imazeki, Yasushi Tomioka, Naoki Tanaka, Seiichi Kondo, Yoshio Taniguchi +2 more | 1993-08-10 |