Issued Patents All Time
Showing 1–25 of 33 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8712255 | Optical receiver and optical transfer apparatus | Hiroshi Takeuchi, Kohei Mandai, Koji Takatori, Hideaki Tsushima | 2014-04-29 |
| 8693869 | Optical transport apparatus and optical transport system | — | 2014-04-08 |
| 8638823 | Sending apparatus, receiving apparatus, and transmission system | Hiroshi Takeuchi, Koji Takatori, Kohei Mandai, Hidemasa Narita | 2014-01-28 |
| 8626001 | Optical communication card and optical transmission device | Masafumi Kamakura, Koji Takatori, Tetsuya Uda, Hidemasa Narita | 2014-01-07 |
| 8588615 | Optical communication card and communication device | Masafumi Kamakura, Koji Takatori, Tetsuya Uda, Hidemasa Narita | 2013-11-19 |
| 8498537 | Optical cross-connect apparatus | Yasuhiro Uchiyama | 2013-07-30 |
| 8165467 | Optical transmission system and optical node | — | 2012-04-24 |
| 8131155 | Optical signal transmission apparatus | Eita Miyasaka | 2012-03-06 |
| 7877011 | Optical switch and optical crossconnect apparatus | — | 2011-01-25 |
| 7848646 | Optical, network, node apparatus and method for recovery path fault | Tooru Hirai | 2010-12-07 |
| 7542672 | Optical switching apparatus with optical reflection monitor and reflection monitoring system | Sunao Kakizaki, Hideaki Tushima, Sigeki Kitajima | 2009-06-02 |
| 7526200 | Wavelength-division multiplexing optical transmitter | Hiroyuki Nakano | 2009-04-28 |
| 7447430 | Optical cross connect apparatus and optical transmission system | Yoshio Nogi, Tomohiro Mori, Hideaki Tsushima | 2008-11-04 |
| 7447398 | Optical crossconnect apparatus | Tooru Hirai | 2008-11-04 |
| 7435013 | Variable dispersion compensation equipment, optical transmission system using it and method of setting dispersion compensation quantity | Tooru Hirai, Takashi Mori, Tetsuya Uda, Hiroyuki Nakano | 2008-10-14 |
| 7415177 | Dispersion compensation device and dispersion compensation method | Hiroyuki Nakano, Tetsuya Uda, Tooru Hirai | 2008-08-19 |
| 7356257 | Optical switching apparatus and optical communication network system | Shigeki Kitajima, Sunao Kakizaki, Hideaki Tsushima | 2008-04-08 |
| 7272314 | Optical crossconnect apparatus and optical transmission system | Yukio Hayashi, Shigeki Kitajima, Tatsuo Kanetake, Masahiro Takatori, Shoichi Hanatani +1 more | 2007-09-18 |
| 7218818 | Dispersion compensation device and dispersion compensation method | Hiroyuki Nakano, Tetsuya Uda, Tooru Hirai | 2007-05-15 |
| 7215843 | Optical switching apparatus and optical switching method | Tooru Hirai | 2007-05-08 |
| 7206475 | Optical switching apparatus, optical transmission system and method of setting up for optical signal route | Sunao Kakizaki, Hideaki Tsushima, Shigeki Kitajima, Takashi Mori | 2007-04-17 |
| 6987899 | Optical switching apparatus and optical switching method | Tooru Hirai | 2006-01-17 |
| 6985649 | Optical switching apparatus and optical switching method | Tooru Hirai | 2006-01-10 |
| 6970614 | Optical switching equipment, optical transport network, and methods of using them | Hideaki Tsushima | 2005-11-29 |
| 6933852 | Optical switching apparatus and optical communication network system | Shigeki Kitajima, Sunao Kakizaki, Hideaki Tsushima | 2005-08-23 |