Issued Patents All Time
Showing 1–25 of 130 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 12057886 | Optical transceiver | Fumio Koyama, Xiaodong Gu | 2024-08-06 |
| 9680288 | Optical amplification device | Setsuo Yoshida | 2017-06-13 |
| 9343872 | Optical amplification device and optical amplification method | Setsuo Yoshida | 2016-05-17 |
| 9258062 | Optical amplification device and optical amplification method | Setsuo Yoshida | 2016-02-09 |
| 9019593 | Optical amplification apparatus | Setsuo Yoshida, George Ishikawa, Goji Nakagawa, Yutaka Kai, Kyosuke Sone +1 more | 2015-04-28 |
| 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 | Yasushi Sugaya | 2015-04-14 |
| 8977131 | Optical apparatus and use method thereof for passive optical network system | Setsuo Yoshida | 2015-03-10 |
| 8965219 | Repeater, relay method and optical transmission system | Kyosuke Sone, George Ishikawa | 2015-02-24 |
| 8942567 | Optical receiving device and communication system | Goji Nakagawa | 2015-01-27 |
| 8896914 | Optical amplifying device | Goji Nakagawa | 2014-11-25 |
| 8890347 | Wind power generation system and control method for the same | Motofumi Tanaka, Hisashi Matsuda, Kunihiko Wada, Hiroyuki Yasui, Shohei Goshima +7 more | 2014-11-18 |
| 8699126 | Multi-wavelength light amplifier | Yasushi Sugaya, Miki Takeda, Terumi Chikama | 2014-04-15 |
| 8674537 | Wind power generation system and control method for the same | Motofumi Tanaka, Hisashi Matsuda, Kunihiko Wada, Hiroyuki Yasui, Shohei Goshima +5 more | 2014-03-18 |
| 8571058 | Terminal apparatus, data transmission system and data transmission method | Kyosuke Sone, George Ishikawa | 2013-10-29 |
| 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 | Yasushi Sugaya | 2013-10-08 |
| 8547629 | Gain and signal level adjustments of cascaded optical amplifiers | Shinya Inagaki, Norifumi Shukunami, Hiroyuki Itou, Taiki Kobayashi | 2013-10-01 |
| 8463135 | Relay apparatus, signal processing apparatus and optical communication system | Kyosuke Sone, Yutaka Kai, George Ishikawa | 2013-06-11 |
| 8427739 | Optical amplifier | Kyosuke Sone | 2013-04-23 |
| 8320040 | Multi-wavelength light amplifier | Yasushi Sugaya, Miki Takeda, Terumi Chikama | 2012-11-27 |
| 8249453 | Optical communication system | Yutaka Takita | 2012-08-21 |
| 8238753 | Optical line terminal | Hiroshi Hamano | 2012-08-07 |
| 8200088 | Optical communication system, and optical communication method and communication unit therefor | Kyosuke Sone | 2012-06-12 |
| 8004752 | Multi-wavelength light amplifier | Yasushi Sugaya, Miki Takeda, Terumi Chikama | 2011-08-23 |
| 7969648 | Gain and signal level adjustments of cascaded optical amplifiers | Shinya Inagaki, Norifumi Shukunami, Hiroyuki Itou, Taiki Kobayashi | 2011-06-28 |
| 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 | Yasushi Sugaya | 2011-06-28 |