Issued Patents All Time
Showing 1–25 of 95 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 9698902 | Optical transmission system and optical transmission device | Kentaro Nakamura, Satoru Okano | 2017-07-04 |
| 9143264 | Optical transmission device and optical transmission system | — | 2015-09-22 |
| 9007680 | Controller which controls a variable optical attenuator to control the power level of a wavelength-multiplexed optical signal when the number of channels are varied | Susumu Kinoshita | 2015-04-14 |
| 8923694 | Optical receiving device | Toshiki Honda, Takehiro Fujita | 2014-12-30 |
| 8699126 | Multi-wavelength light amplifier | Miki Takeda, Susumu Kinoshita, Terumi Chikama | 2014-04-15 |
| 8681420 | Optical transmission system | Takehiro Fujita | 2014-03-25 |
| 8615167 | WDM optical transmission system and control method thereof | Takehiro Fujita, Satoru Okano | 2013-12-24 |
| 8553319 | Controller which controls a variable optical attenuator to control the power level of a wavelength-multiplexed optical signal when the number of channels are varied | Susumu Kinoshita | 2013-10-08 |
| 8320040 | Multi-wavelength light amplifier | Miki Takeda, Susumu Kinoshita, Terumi Chikama | 2012-11-27 |
| 8248689 | Distributed Raman amplifying system, start-up method thereof, and optical device | Masanori Kondoh, Togo Fukushi, Miki Onaka, Kiyotoshi Noheji | 2012-08-21 |
| 8200090 | Optical transmission apparatus, optical transmission method, and optical transceiver | Yuichiro Sakane, Ryuta Hoshi, Akira Yamamoto, Tsutomu Tsurumi, Tomoyuki Sakata +2 more | 2012-06-12 |
| 8068730 | Wavelength division multiplex signal monitoring system and wavelength division multiplex transmission device equipped with the same | Yoshito Kachita, Ichiro Nakajima, Ryosuke Goto | 2011-11-29 |
| 8064130 | Optical amplifier | Masato Nishihara, Etsuko Hayashi | 2011-11-22 |
| 8054455 | Optical amplifier provided with control function of pumping light, and optical transmission system using the same | Etsuko Hayashi, Masato Nishihara | 2011-11-08 |
| 8049955 | Optical amplification apparatus, optical communication apparatus, and optical communication method | Miki Onaka, Togo Fukushi, Masanori Kondoh, Kiyotoshi Noheji, Takashi Hayasaka | 2011-11-01 |
| 8004752 | Multi-wavelength light amplifier | Miki Takeda, Susumu Kinoshita, Terumi Chikama | 2011-08-23 |
| 7983564 | Transmission system and transmission method | Hiroki Ooi, Akira Miura, Takeshi Hoshida, Kentaro Nakamura, Ryosuke Goto | 2011-07-19 |
| 7969649 | Controller which controls a variable optical attenuator to control the power level of a wavelength-multiplexed optical signal when the number of channels are varied | Susumu Kinoshita | 2011-06-28 |
| 7843631 | Gain control apparatus, optical transmission apparatus, gain control method for optical amplifier, and wavelength multiplex optical transmission system | Miki Onaka, Hideaki Sugiya, Etsuko Hayashi | 2010-11-30 |
| 7813642 | Optical transmission apparatus and method of controlling the same | Shinichirou Muro, Hideaki Sugiya, Etsuko Hayashi | 2010-10-12 |
| 7796325 | Distributed Raman amplifier and WDM optical transmission system | — | 2010-09-14 |
| 7725032 | Optical transmission apparatus | Miki Onaka, Hiroki Ooi | 2010-05-25 |
| 7719758 | Optical amplifier provided with control function of pumping light, and optical transmission system using the same | Etsuko Hayashi | 2010-05-18 |
| 7650074 | Optical transmission apparatus | — | 2010-01-19 |
| 7650072 | Method of upgrading optical node, and an optical node apparatus | Miki Onaka, Takahumi Terahara, Satoru Okano, Takehiro Fujita, Hiroaki Tomofuji +1 more | 2010-01-19 |