Issued Patents All Time
Showing 1–25 of 60 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 10027408 | Multi-carrier optical transmission system, optical transmitter, and optical receiver | Masato Nishihara, Toshiki Tanaka, Tomoo Takahara | 2018-07-17 |
| 9998230 | Optical transmitter, optical communication system, and optical transmission/reception control method | Masato Nishihara, Toshiki Tanaka, Tomoo Takahara, Ryou Okabe | 2018-06-12 |
| 9998233 | Optical reception apparatus | Ryou Okabe, Masato Nishihara, Toshiki Tanaka, Tomoo Takahara | 2018-06-12 |
| 9973276 | Optical receiving device and method for controlling dispersion compensation amount | Tomoo Takahara, Toshiki Tanaka, Masato Nishihara, Ryou Okabe | 2018-05-15 |
| 9876601 | Optical transmission system, controller for wavelength tunable filter, and control method of wavelength tunable filter | Toshiki Tanaka, Ryou Okabe, Tomoo Takahara, Masato Nishihara | 2018-01-23 |
| 9853728 | Method for determining numbers of bits allocated to subcarriers and optical transmission system | Masato Nishihara, Toshiki Tanaka, Ryou Okabe, Tomoo Takahara | 2017-12-26 |
| 9467229 | Multilevel intensity modulation and demodulation system and method | Masato Nishihara, Toshiki Tanaka, Tomoo Takahara | 2016-10-11 |
| 9425897 | Transmission apparatus, transmission system, and transmission method | Masato Nishihara, Toshiki Tanaka, Tomoo Takahara | 2016-08-23 |
| 9088383 | Transmitting apparatus, receiving apparatus, optical frequency division multiplex transmission system, and optical signal communication method | Toshiki Tanaka, Masato Nishihara, Tomoo Takahara, Tomoyuki Kato, Shigeki Watanabe | 2015-07-21 |
| 9077470 | Optical transmission system using cross phase modulation | Shigeki Watanabe, Ryou Okabe, Tomoyuki Kato | 2015-07-07 |
| 9019593 | Optical amplification apparatus | Setsuo Yoshida, Susumu Kinoshita, George Ishikawa, Goji Nakagawa, Kyosuke Sone +1 more | 2015-04-28 |
| 8937762 | Level control circuit, level control method, and level control system | Setsuo Yoshida, Taku Yoshida, Keisuke Harada | 2015-01-20 |
| 8867927 | Optical transmitting apparatus, optical receiving apparatus, and optical communication system comprising them | Yuichi Akiyama, Takeshi Hoshida, Akira Miura, Hiroki Ooi, Jens Rasmussen +5 more | 2014-10-21 |
| 8824043 | Optical output level control apparatus | Setsuo Yoshida, Taku Yoshida, Keisuke Harada | 2014-09-02 |
| 8787757 | Optical communication network and supervisory control device | — | 2014-07-22 |
| 8582984 | Waveform controller, responsive element module, optical switch apparatus, responsive element and optical switch apparatus control method | — | 2013-11-12 |
| 8538259 | Optical access network system | — | 2013-09-17 |
| 8463135 | Relay apparatus, signal processing apparatus and optical communication system | Kyosuke Sone, George Ishikawa, Susumu Kinoshita | 2013-06-11 |
| 8331780 | Optical packet switching apparatus and optical packet switching method | — | 2012-12-11 |
| 8275258 | Optical communication base station, optical signal conversion apparatus, and optical signal conversion method | Yasuhiko Aoki | 2012-09-25 |
| 8179593 | Optical-switch drive circuit and method thereof | Masaji Noguchi, Setsuo Yoshida | 2012-05-15 |
| 8170416 | Optical switching device | Yasuhiko Aoki | 2012-05-01 |
| 8155517 | Optical packet switching apparatus | Keisuke Harada | 2012-04-10 |
| 8139903 | Driving circuit of optical gate switch | Masaji Noguchi, Tomohiro Ueno, Setsuo Yoshida | 2012-03-20 |
| 8107813 | Drive circuit and optical switch | Setsuo Yoshida, Masaji Noguchi | 2012-01-31 |