Issued Patents All Time
Showing 26–50 of 78 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6181449 | Wavelength division multiplexed optical processing device and optical communication transmission path | Hidenori Taga, Kaoru Imai, Masatoshi Suzuki, Shigeyuki Akiba | 2001-01-30 |
| 6160649 | Optical power measuring system terminal station and repeater therefor | Yukio Horiuchi, Shigeyuki Akiba | 2000-12-12 |
| 6115173 | Optical amplifying transmission system and optical amplifier | Keiji Tanaka, Noboru Edagawa | 2000-09-05 |
| 6028695 | Optical modulating apparatus | Aritomo Uemura, Takashi Mizuochi, Katsuhiro Shimizu, Kiwami Matsushita, Tadayoshi Kitayama +2 more | 2000-02-22 |
| 6021235 | Wavelength-division multiplexing optical transmission system | Hidenori Taga, Masatoshi Suzuki, Noboru Edagawa, 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, Noboru Edagawa, Shigeyuki Akiba | 1999-12-21 |
| 5978529 | Gain equalizer and optical amplifying transmission line | Hidenori Taga, Noriyuki Takeda, Masatoshi Suzuki, Shigeyuki Akiba | 1999-11-02 |
| 5966228 | Optical transmission system and optical repeater | Shigeyuki Akiba, Masatoshi Suzuki, Noboru Edagawa, Hidenori Taga | 1999-10-12 |
| 5959764 | Wavelength converter, optically operational device and optical pulse phase detecting circuit | Noboru Edagawa, Masatoshi Suzuki | 1999-09-28 |
| 5937126 | Optically amplifying/repeating transmission system and optical amplifier | Noboru Edagawa, Hidenori Taga, Shigeyuki Akiba | 1999-08-10 |
| 5930015 | Optical access system | Takaya Yamamoto, Katsuyuki Yamazaki, Yotaro Yatsuzuka | 1999-07-27 |
| 5926300 | Optical add-drop multiplexer | Takayuki Miyakawa, Hidenori Taga, Shigeyuki Akiba | 1999-07-20 |
| 5920413 | Method and device for optical add/drop multiplexing using high speed polarization scrambler | Takayuki Miyakawa, Hidenori Taga, Shigeyuki Akiba | 1999-07-06 |
| 5912750 | Optical transmission line | Noriyuki Takeda, Takayuki Miyakawa, Hidenori Taga, Shigeyuki Akiba | 1999-06-15 |
| 5903375 | Surveillance method of optical communication line | Yukio Horiuchi | 1999-05-11 |
| 5898502 | Optical wavelength monitoring apparatus | Yukio Horiuchi | 1999-04-27 |
| 5898714 | Optical pulse generator | Itsuro Morita, Noboru Edagawa, Masatoshi Suzuki, Shigeyuki Akiba | 1999-04-27 |
| 5892608 | Optical receiver device for dark soliton lightwave | Masatoshi Suzuki, Noboru Edagawa, Hidenori Taga, Shigeyuki Akiba | 1999-04-06 |
| 5889607 | Optical modulator, optical short pulse generating device, optical waveform shaping device, and optical demultiplexer device | Masatoshi Suzuki, Noboru Edagawa, Itsuro Morita, Shigeyuki Akiba | 1999-03-30 |
| 5886803 | Bilateral optical transmission system and optical transceiver for pulse information | Takaya Yamamoto, Katsuyuki Yamamoto, Yotaro Yatsuzuka | 1999-03-23 |
| 5877878 | Surveillance method of optical amplifier-repeater transmission system | Yukio Horiuchi, Shigeyuki Akiba | 1999-03-02 |
| 5872647 | Optical transmitting terminal | Hidenori Taga, Noboru Edagawa, 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, Noboru Edagawa, Itsuro Morita, Shigeyuki Akiba | 1999-01-26 |
| 5838477 | Optical submarine branching device | Noboru Edagawa, Hidenori Taga, Tetsuyuki Miyakawa | 1998-11-17 |
| 5808789 | Optically amplifying transmission system | Noboru Edagawa, Hidenori Taga, Masatoshi Suzuki, Itsuro Morita, Shigeyuki Akiba | 1998-09-15 |