Issued Patents All Time
Showing 1–22 of 22 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 12424848 | Power system | Taiichi Otsuji, Hirohito Yamada, Masafumi YASHIMA, Masakazu Matsui, Hiroyuki Koshi | 2025-09-23 |
| 11848556 | Power and communications network convergence system, and control method therein | Taiichi Otsuji | 2023-12-19 |
| 8014672 | Optical wavelength multiplexing access system | Hiroo Suzuki, Takashi Yamada | 2011-09-06 |
| 7869717 | Optical communication light source unit and wavelength monitoring control method | Shingo Kawai, Kiyoshi Matsumoto, Hideo KAWATA, Naoto Yoshimoto | 2011-01-11 |
| 7555215 | Optical wavelength division multiplexing access system | Hirotaka Nakamura, Junichi KANI, Hiroo Suzuki, Mitsuhiro Teshima, Ukyo Yamaguchi +1 more | 2009-06-30 |
| 7474460 | Optical modulation apparatus | Masamichi Fujiwara, Junichi KANI, Koji Akimoto | 2009-01-06 |
| 7460572 | Optical module and method for monitoring and controlling wavelengths | Shingo Kawai, Hideo Kawada, Naoto Yoshimoto, Toru Ogawa | 2008-12-02 |
| 7433594 | Node apparatus, optical wavelength division multiplexing network, and system switching method | Noboru Takachio, Hitoshi Obara | 2008-10-07 |
| 7389048 | Optical wavelength-division multiple access system and optical network unit | Jun-ichi Kani | 2008-06-17 |
| 7336414 | Optical modulating device | Masamichi Fujiwara, Junichi KANI, Koji Akimoto | 2008-02-26 |
| 7206510 | Ring network using multi-wavelength generator | Hiroo Suzuki, Masamichi Fujiwara, Mitsuhiro Teshima, Koji Akimoto, Shingo Kawai +2 more | 2007-04-17 |
| 7203422 | Optical network unit, wavelength splitter, and optical wavelength-division multiplexing access system | Jun-ichi Kani | 2007-04-10 |
| 7164861 | Node apparatus, optical wavelength division multiplexing network, and system switching method | Noboru Takachio, Hitoshi Obara | 2007-01-16 |
| 7155127 | Optical communication system, optical communication unit, and optical transceiving package | Koji Akimoto, Jun-ichi Kani, Mitsuhiro Teshima, Masaki Fukui | 2006-12-26 |
| 7127168 | Multi-wavelength optical modulation circuit and wavelength-division multiplexed optical signal transmitter | Jun-ichi Kani, Katsuhiro Araya, Noboru Takachio, Koji Akimoto, Mitsuhiro Teshima +3 more | 2006-10-24 |
| 7106970 | Polarization scrambler and optical network using the same | Masamichi Fujiwara, Mitsuhiro Teshima, Noboru Takachio | 2006-09-12 |
| 7076166 | Low-cost optical burst transmission system, apparatus, and method | Masaru Fuse, Toru Shiozaki, Yoshikazu Ishii, Hiroaki Asano, Kuniaki Utsumi +3 more | 2006-07-11 |
| 7031614 | Polarization scrambler and optical network using the same | Masamichi Fujiwara, Mitsuhiro Teshima, Noboru Takachio | 2006-04-18 |
| 6959152 | Polarization scrambler and optical network using the same | Masamichi Fujiwara, Mitsuhiro Teshima, Noboru Takachio | 2005-10-25 |
| 5986789 | Optical transmission line and optical transmission system | Shingo Kawai, Kenichi Suzuki | 1999-11-16 |
| 5764841 | Optical fiber transmission line, optical fiber transmission system and production method thereof, and optical fiber combining method | Kenichi Suzuki, Shingo Kawai | 1998-06-09 |
| 5724126 | Method for measuring distribution of zero dispersion wavelengths in an optical fiber and apparatus therefor | Shigendo Nishi, Ken Suzuki, Masatoshi Saruwatari | 1998-03-03 |