Issued Patents All Time
Showing 26–50 of 59 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6115173 | Optical amplifying transmission system and optical amplifier | Keiji Tanaka, Shu Yamamoto | 2000-09-05 |
| 6091538 | Gain equalizing apparatus | Noriyuki Takeda, Shigeyuki Akiba, Hidenori Taga | 2000-07-18 |
| 6021235 | Wavelength-division multiplexing optical transmission system | Shu Yamamoto, Hidenori Taga, Masatoshi Suzuki, Shigeyuki Akiba | 2000-02-01 |
| 6005702 | Optical transmission device, WDM optical transmission apparatus, and optical transmission system using return-to-zero optical pulses | Masatoshi Suzuki, Itsuro Morita, Shu Yamamoto, Shigeyuki Akiba | 1999-12-21 |
| 5966228 | Optical transmission system and optical repeater | Shigeyuki Akiba, Shu Yamamoto, Masatoshi Suzuki, Hidenori Taga | 1999-10-12 |
| 5959764 | Wavelength converter, optically operational device and optical pulse phase detecting circuit | Masatoshi Suzuki, Shu Yamamoto | 1999-09-28 |
| 5937126 | Optically amplifying/repeating transmission system and optical amplifier | Shu Yamamoto, Hidenori Taga, Shigeyuki Akiba | 1999-08-10 |
| 5898714 | Optical pulse generator | Itsuro Morita, Masatoshi Suzuki, Shu Yamamoto, Shigeyuki Akiba | 1999-04-27 |
| 5892608 | Optical receiver device for dark soliton lightwave | Masatoshi Suzuki, Hidenori Taga, Shu Yamamoto, Shigeyuki Akiba | 1999-04-06 |
| 5889607 | Optical modulator, optical short pulse generating device, optical waveform shaping device, and optical demultiplexer device | Masatoshi Suzuki, Itsuro Morita, Shu Yamamoto, Shigeyuki Akiba | 1999-03-30 |
| 5872647 | Optical transmitting terminal | Hidenori Taga, Shu Yamamoto, Shigeyuki Akiba | 1999-02-16 |
| 5864421 | Optical frequency shifter and optical soliton-like return-to-zero pulse transmission system using optical frequency shifter | Masatoshi Suzuki, Itsuro Morita, Shu Yamamoto, Shigeyuki Akiba | 1999-01-26 |
| 5838477 | Optical submarine branching device | Shu Yamamoto, Hidenori Taga, Tetsuyuki Miyakawa | 1998-11-17 |
| 5808789 | Optically amplifying transmission system | Hidenori Taga, Masatoshi Suzuki, Itsuro Morita, Shu Yamamoto, Shigeyuki Akiba | 1998-09-15 |
| 5786918 | Optical communication system and optical transmitting device | Masatoshi Suzuki, Hidenori Taga, Hideaki Tanaka, Shu Yamamoto, Shigeyuki Akiba | 1998-07-28 |
| 5737110 | Optical communication system using dark soliton lightwave | Masatoshi Suzuki, Hidenori Taga, Shu Yamamoto, Shigeyuki Akiba | 1998-04-07 |
| 5710660 | Gain-controllable optical amplifier and optical gain-control method | Shu Yamamoto, Hidenori Taga, Shigeyuki Akiba, Kuniaki Motoshima, Katsumi Takano +1 more | 1998-01-20 |
| 5642215 | Optical transmission system | Masatoshi Suzuki, Itsuro Morita, Hidenori Taga, Shu Yamamoto, Shigeyuki Akiba | 1997-06-24 |
| 5629795 | Optical amplifying-repeating transmission system | Masatoshi Suzuki, Itsuro Morita, Shu Yamamoto, Hidenori Taga, Shigeyuki Akiba | 1997-05-13 |
| 5625479 | Soliton optical communication system and optical transmitter and optical receiver therefor | Masatoshi Suzuki, Hidenori Taga, Shu Yamamoto, Shigeyuki Akiba | 1997-04-29 |
| 5589969 | Wavelength division multiplexed optical fiber transmission equipment | Hidenori Taga, Noriyuki Takeda, Shu Yamamoto, Shigeyuki Akiba | 1996-12-31 |
| 5574590 | Optical amplifying transmitting system | Masatoshi Suzuki, Hidenori Taga, Itsuro Morita, Shu Yamamoto, Shigeyuki Akiba | 1996-11-12 |
| 5559910 | Wavelength division multiplexed optical fiber transmission equiptment | Hidenori Taga, Shu Yamamoto, Noriyuki Takeda, Shigeyuki Akiba | 1996-09-24 |
| 5471333 | Optical communication system | Hidenori Taga, Masatoshi Suzuki, Shu Yamamoto, Hiroharu Wakabayashi | 1995-11-28 |
| 5430795 | Optical transmitter with the signal light of reduced degree of polarization and optical depolarizing circuit | Hidenori Taga, Shu Yamamoto, Shigeyuki Akiba, Hiroharu Wakabayashi | 1995-07-04 |