Issued Patents All Time
Showing 1–25 of 27 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8126333 | Optical transmission system and synchronization method using time reference pulse | — | 2012-02-28 |
| 7551854 | Method to provide caller's location in IP phone system, optical transmission system, optical connector, and optical network unit | Noboru Edagawa | 2009-06-23 |
| 7310315 | Node judging method, communication system, and node measuring apparatus | Masatoshi Suzuki | 2007-12-18 |
| 7158728 | Optical repeating system and optical amplifying repeater control method | Yasunori Kasahara, Hideki Goto, Takashi Mizuochi, Kenkichi Shimomura, Masatoshi Suzuki +2 more | 2007-01-02 |
| 7142787 | Optical data transmission method and its system, optical transmitter and its method, and optical switcher | Shu Yamamoto | 2006-11-28 |
| 7130544 | Optical repeating system and optical amplifying repeater control method | Yasunori Kasahara, Hideki Goto, Takashi Mizuochi, Kenkichi Shimomura, Masatoshi Suzuki +2 more | 2006-10-31 |
| 6914718 | Optical repeating system and optical amplifying repeater control method | Yasunori Kasahara, Hideki Goto, Takashi Mizuochi, Kenkichi Shimomura, Masatoshi Suzuki +2 more | 2005-07-05 |
| 6867908 | Optical amplifier having various control circuitry | Aritomo Uemura, Kiwami Matsushita, Masatoshi Suzuki, Noboru Edagawa, Shu Yamamoto +1 more | 2005-03-15 |
| 6804469 | Supervisory system of optical amplifier repeater system and supervisory method of optical amplifier repeater system | Yasunori Kasahara, Hideki Goto, Takashi Mizuochi, Kenkichi Shimomura, Masatoshi Suzuki +2 more | 2004-10-12 |
| 6614588 | Optical amplifier having various control circuitry | Aritomo Uemura, Kiwami Matsushita, Masatoshi Suzuki, Noboru Edagawa, Shu Yamamoto +1 more | 2003-09-02 |
| 6594003 | Measuring system of transmission characteristics | Toshio Kawazawa | 2003-07-15 |
| 6556325 | Optical repeater monitoring system and a method thereof | Masatoshi Suzuki, Shu Yamamoto, Shigeyuki Akiba | 2003-04-29 |
| 6201599 | Optical transmission line monitoring apparatus | Shiro Ryu | 2001-03-13 |
| 6188508 | Control signal superimposer | Masatoshi Suzuki, Shu Yamamoto, Shigeyuki Akiba | 2001-02-13 |
| 6185020 | Apparatus for detecting a fault location in an optical fiber line | Shiro Ryu | 2001-02-06 |
| 6160649 | Optical power measuring system terminal station and repeater therefor | Shu Yamamoto, Shigeyuki Akiba | 2000-12-12 |
| 5903375 | Surveillance method of optical communication line | Shu Yamamoto | 1999-05-11 |
| 5898502 | Optical wavelength monitoring apparatus | Shu Yamamoto | 1999-04-27 |
| 5877878 | Surveillance method of optical amplifier-repeater transmission system | Shu Yamamoto, Shigeyuki Akiba | 1999-03-02 |
| 5790294 | Line monitoring method and line monitoring apparatus | Shu Yamamoto, Shigeyuki Akiba | 1998-08-04 |
| 5771255 | Laser light generator | Shu Yamamoto, Shigeyuki Akiba | 1998-06-23 |
| 5726789 | Method and device for modulating optical short pulses | Masatoshi Suzuki | 1998-03-10 |
| 5539557 | Supervisory signal receiving method and apparatus | Hiroharu Wakabayashi, Shigeyuki Akiba, Shu Yamamoto | 1996-07-23 |
| 5463461 | Coherent optical receiver having optically amplified local oscillator signal | Shiro Ryu | 1995-10-31 |
| 5406368 | Method and apparatus for chromatic dispersion measurements | Yoshinori Namihira, Hiroharu Wakabayashi | 1995-04-11 |