Issued Patents All Time
Showing 26–42 of 42 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5822095 | Optical add-drop multiplexer | Takayuki Miyakawa, Shigeyuki Akiba | 1998-10-13 |
| 5808789 | Optically amplifying transmission system | Noboru Edagawa, Masatoshi Suzuki, Itsuro Morita, Shu Yamamoto, Shigeyuki Akiba | 1998-09-15 |
| 5790289 | WDM optical communication method with pre-emphasis technique and an apparatus therefor | Noriyuki Takeda, Shu Yamamoto, Shigeyuki Akiba | 1998-08-04 |
| 5786918 | Optical communication system and optical transmitting device | Masatoshi Suzuki, Noboru Edagawa, Hideaki Tanaka, Shu Yamamoto, Shigeyuki Akiba | 1998-07-28 |
| 5737110 | Optical communication system using dark soliton lightwave | Masatoshi Suzuki, Noboru Edagawa, Shu Yamamoto, Shigeyuki Akiba | 1998-04-07 |
| 5710660 | Gain-controllable optical amplifier and optical gain-control method | Shu Yamamoto, Noboru Edagawa, Shigeyuki Akiba, Kuniaki Motoshima, Katsumi Takano +1 more | 1998-01-20 |
| 5642215 | Optical transmission system | Masatoshi Suzuki, Itsuro Morita, Noboru Edagawa, Shu Yamamoto, Shigeyuki Akiba | 1997-06-24 |
| 5629795 | Optical amplifying-repeating transmission system | Masatoshi Suzuki, Itsuro Morita, Shu Yamamoto, Noboru Edagawa, Shigeyuki Akiba | 1997-05-13 |
| 5625479 | Soliton optical communication system and optical transmitter and optical receiver therefor | Masatoshi Suzuki, Noboru Edagawa, Shu Yamamoto, Shigeyuki Akiba | 1997-04-29 |
| 5589969 | Wavelength division multiplexed optical fiber transmission equipment | Noboru Edagawa, Noriyuki Takeda, Shu Yamamoto, Shigeyuki Akiba | 1996-12-31 |
| 5585954 | Apparatus for measuring optical transmission characteristic | Shu Yamamoto, Shigeyuki Akiba | 1996-12-17 |
| 5574590 | Optical amplifying transmitting system | Noboru Edagawa, Masatoshi Suzuki, Itsuro Morita, Shu Yamamoto, Shigeyuki Akiba | 1996-11-12 |
| 5559910 | Wavelength division multiplexed optical fiber transmission equiptment | Noboru Edagawa, Shu Yamamoto, Noriyuki Takeda, Shigeyuki Akiba | 1996-09-24 |
| 5471333 | Optical communication system | Masatoshi Suzuki, Noboru Edagawa, Shu Yamamoto, Hiroharu Wakabayashi | 1995-11-28 |
| 5430795 | Optical transmitter with the signal light of reduced degree of polarization and optical depolarizing circuit | Noboru Edagawa, Shu Yamamoto, Shigeyuki Akiba, Hiroharu Wakabayashi | 1995-07-04 |
| 5162936 | Apparatus for monitoring the operation of an optical repeater | Shu Yamamoto, Noboru Edagawa, Hiroharu Wakabayashi | 1992-11-10 |
| 5140452 | Long-distance high-speed optical communication scheme | Shu Yamamoto, Noboru Edagawa, Yoshihiro Yoshida, Shiro Ryu, Hiroharu Wakabayashi | 1992-08-18 |