Issued Patents All Time
Showing 1–9 of 9 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7542672 | Optical switching apparatus with optical reflection monitor and reflection monitoring system | Hideaki Tushima, Sigeki Kitajima, Yasuyuki Fukashiro | 2009-06-02 |
| 7356257 | Optical switching apparatus and optical communication network system | Shigeki Kitajima, Hideaki Tsushima, Yasuyuki Fukashiro | 2008-04-08 |
| 7206475 | Optical switching apparatus, optical transmission system and method of setting up for optical signal route | Hideaki Tsushima, Shigeki Kitajima, Yasuyuki Fukashiro, Takashi Mori | 2007-04-17 |
| 6975811 | Optical one-to-one protection switching apparatus | Hideaki Tsushima, Takashi Mori, Masahiro Takatori, Yukio Hayashi, Shinichi Kuwano | 2005-12-13 |
| 6933852 | Optical switching apparatus and optical communication network system | Shigeki Kitajima, Hideaki Tsushima, Yasuyuki Fukashiro | 2005-08-23 |
| 6839480 | Optical switching apparatus, optical transmission system and method of setting up for optical signal route | Hideaki Tsushima, 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 | Hideaki Tsushima, Shigeki Kitajima, Yasuyuki Fukashiro, Takashi Mori | 2004-08-17 |
| 6434286 | Optical signal switching apparatus | Yukio Hayashi, Hideaki Tsushima, Shinichi Kuwano | 2002-08-13 |
| 5627923 | Three-dimensional opto-electric integrated circuit using optical wiring | — | 1997-05-06 |