Issued Patents All Time
Showing 1–5 of 5 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 9306670 | Optical coupling/splitting device, two-way optical propagation device, and optical-transmit-receive system | Masamichi Fujiwara, Kenichi Suzuki, Manabu Oguma, Toshio Watanabe, Hiroshi Takahashi +2 more | 2016-04-05 |
| 9276670 | Self-diagnostic method for PON protection system, and PON protection system | Youichi Fukada, Takashi Mitsui, Takeshi Sakamoto, Yasutaka Kimura | 2016-03-01 |
| 9179204 | Optical network system | Takashi Mitsui, Youichi Fukada, Takeshi Sakamoto | 2015-11-03 |
| 7869717 | Optical communication light source unit and wavelength monitoring control method | Shingo Kawai, Kiyoshi Matsumoto, Hideo KAWATA, Katsumi Iwatsuki | 2011-01-11 |
| 7460572 | Optical module and method for monitoring and controlling wavelengths | Shingo Kawai, Hideo Kawada, Toru Ogawa, Katsumi Iwatsuki | 2008-12-02 |