Issued Patents All Time
Showing 51–75 of 78 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5790289 | WDM optical communication method with pre-emphasis technique and an apparatus therefor | Hidenori Taga, Noriyuki Takeda, Shigeyuki Akiba | 1998-08-04 |
| 5790294 | Line monitoring method and line monitoring apparatus | Yukio Horiuchi, Shigeyuki Akiba | 1998-08-04 |
| 5786918 | Optical communication system and optical transmitting device | Masatoshi Suzuki, Hidenori Taga, Noboru Edagawa, Hideaki Tanaka, Shigeyuki Akiba | 1998-07-28 |
| 5771255 | Laser light generator | Yukio Horiuchi, Shigeyuki Akiba | 1998-06-23 |
| 5739943 | Polarization control unit | Shigeru Ohshima, Tazuko Tomioka, Mitsuko Nakamura, Senji Shimanuki, Manish Sharma +2 more | 1998-04-14 |
| 5737110 | Optical communication system using dark soliton lightwave | Masatoshi Suzuki, Noboru Edagawa, Hidenori Taga, Shigeyuki Akiba | 1998-04-07 |
| 5710660 | Gain-controllable optical amplifier and optical gain-control method | Hidenori Taga, Noboru Edagawa, Shigeyuki Akiba, Kuniaki Motoshima, Katsumi Takano +1 more | 1998-01-20 |
| 5642215 | Optical transmission system | Masatoshi Suzuki, Itsuro Morita, Noboru Edagawa, Hidenori Taga, Shigeyuki Akiba | 1997-06-24 |
| 5629795 | Optical amplifying-repeating transmission system | Masatoshi Suzuki, Itsuro Morita, Noboru Edagawa, Hidenori Taga, Shigeyuki Akiba | 1997-05-13 |
| 5625479 | Soliton optical communication system and optical transmitter and optical receiver therefor | Masatoshi Suzuki, Noboru Edagawa, Hidenori Taga, Shigeyuki Akiba | 1997-04-29 |
| 5589969 | Wavelength division multiplexed optical fiber transmission equipment | Hidenori Taga, Noboru Edagawa, Noriyuki Takeda, Shigeyuki Akiba | 1996-12-31 |
| 5585954 | Apparatus for measuring optical transmission characteristic | Hidenori Taga, Shigeyuki Akiba | 1996-12-17 |
| 5574590 | Optical amplifying transmitting system | Noboru Edagawa, Masatoshi Suzuki, Hidenori Taga, Itsuro Morita, Shigeyuki Akiba | 1996-11-12 |
| 5559910 | Wavelength division multiplexed optical fiber transmission equiptment | Hidenori Taga, Noboru Edagawa, Noriyuki Takeda, Shigeyuki Akiba | 1996-09-24 |
| 5539557 | Supervisory signal receiving method and apparatus | Yukio Horiuchi, Hiroharu Wakabayashi, Shigeyuki Akiba | 1996-07-23 |
| 5471333 | Optical communication system | Hidenori Taga, Masatoshi Suzuki, Noboru Edagawa, Hiroharu Wakabayashi | 1995-11-28 |
| 5430795 | Optical transmitter with the signal light of reduced degree of polarization and optical depolarizing circuit | Hidenori Taga, Noboru Edagawa, Shigeyuki Akiba, Hiroharu Wakabayashi | 1995-07-04 |
| 5401957 | Optical waveform shaping device for peforming waveform equalization and timing synchronization | Masatoshi Suzuki, Noboru Edagawa, Hideaki Tanaka, Yuichi Matsushima | 1995-03-28 |
| 5162936 | Apparatus for monitoring the operation of an optical repeater | Hidenori Taga, Noboru Edagawa, Hiroharu Wakabayashi | 1992-11-10 |
| 5140452 | Long-distance high-speed optical communication scheme | Hidenori Taga, Noboru Edagawa, Yoshihiro Yoshida, Shiro Ryu, Hiroharu Wakabayashi | 1992-08-18 |
| 5138621 | Pumping light source drive system for an optical amplifier | Koji Goto, Yukio Horiuchi, Hiroharu Wakabayashi | 1992-08-11 |
| 4790655 | System for measuring laser spectrum | Kiyofumi Mochizuki | 1988-12-13 |
| 4764980 | System for measuring delay time variation in optical fiber digital communication system | Haruo Sakaguchi, Norio Seki, Yoshinao Iwamoto | 1988-08-16 |
| 4747094 | Signal coupling system for optical repeater system | Haruo Sakaguchi, Norio Seki, Yoshinao Iwamoto | 1988-05-24 |
| 4737949 | Transmission system for digital repeater supervisory code transmission | — | 1988-04-12 |