Issued Patents All Time
Showing 26–33 of 33 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6839480 | Optical switching apparatus, optical transmission system and method of setting up for optical signal route | Sunao Kakizaki, Hideaki Tsushima, Shigeki Kitajima, Takashi Mori | 2005-01-04 |
| 6813445 | Optical crossconnect apparatus and optical transmission system | Yukio Hayashi, Shigeki Kitajima, Tatsuo Kanetake, Masahiro Takatori, Shoichi Hanatani +1 more | 2004-11-02 |
| 6778725 | Optical switching apparatus, optical transmission system and method of setting up for optical signal route | Sunao Kakizaki, Hideaki Tsushima, Shigeki Kitajima, Takashi Mori | 2004-08-17 |
| 6714697 | Optical switching apparatus and optical switching method | Tooru Hirai | 2004-03-30 |
| 6362905 | Optical crossconnect apparatus and optical transmission system | Yukio Hayashi, Shigeki Kitajima, Tatsuo Kanetake, Masahiro Takatori, Shoichi Hanatani +1 more | 2002-03-26 |
| 6341032 | Method and system for reducing optical surge | Hideaki Tsushima, Yukio Hayashi | 2002-01-22 |
| 6334009 | Optical signal switching apparatus | Shinichi Kuwano, Kenji Yamahara, Yukio Hayashi, Hideaki Tsushima | 2001-12-25 |
| 6229932 | Optical signal switching apparatus | Shinichi Kuwano, Kenji Yamahara, Yukio Hayashi, Hideaki Tsushima | 2001-05-08 |