Issued Patents All Time
Showing 1–25 of 66 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 10355452 | Optical module and method for controlling optical module | — | 2019-07-16 |
| 10056979 | Optical transmission device and optical communication system | — | 2018-08-21 |
| 9910221 | Polarization reducing apparatus, light source apparatus, optical amplifying apparatus, and excitation light source apparatus for raman amplification | — | 2018-03-06 |
| 9910300 | Variable optical attenuator and optical module | Yuya Osumi, Jun Okabe | 2018-03-06 |
| 9645314 | Optical device | — | 2017-05-09 |
| 9411098 | Polarization reducing apparatus, light source apparatus, optical amplifying apparatus, and excitation light source apparatus for raman amplification | — | 2016-08-09 |
| 9413462 | Optical amplification repeater and optical transmission station | — | 2016-08-09 |
| 9325141 | Amplifying apparatus and amplifying medium | — | 2016-04-26 |
| 9250385 | Optical transmission medium and optical amplifier | — | 2016-02-02 |
| 9231366 | Optical transmitting device and optical transmission system | — | 2016-01-05 |
| 9025955 | Amplification apparatus and communication system | — | 2015-05-05 |
| 8837037 | Optical delay device, optical circuit, and optical delay method | — | 2014-09-16 |
| 8774624 | Optical transmission apparatus and optical communication system | Yuichi Suzuki | 2014-07-08 |
| 8681419 | Optical amplifier and transmission loss measurement method | — | 2014-03-25 |
| 8670176 | Optical amplifying device | Mayumi Naito, Yuichi Suzuki | 2014-03-11 |
| 8620160 | Optical transmission apparatus | — | 2013-12-31 |
| 8606115 | Optical transmission apparatus and optical communication system | — | 2013-12-10 |
| 8538264 | Dispersion compensating apparatus, dispersion compensating method, optical receiving apparatus, and optical receiving method | Masahiro Yuki, Tsukasa Takahashi, Norifumi Shukunami, Tatsuya Tsuzuki, Toshihiro Ohtani +1 more | 2013-09-17 |
| 8514484 | Optical amplifier and optical fiber | — | 2013-08-20 |
| 8503882 | Optical receiver and control apparatus | Kazuto Imai | 2013-08-06 |
| 8482849 | Raman amplifier and control method thereof | — | 2013-07-09 |
| 8451532 | Control apparatus of optical amplifier | Taichi Ueki | 2013-05-28 |
| 8452193 | Optical receiver | — | 2013-05-28 |
| 8275269 | Distributed Raman amplifier and optical communication system | — | 2012-09-25 |
| 8248689 | Distributed Raman amplifying system, start-up method thereof, and optical device | Masanori Kondoh, Yasushi Sugaya, Togo Fukushi, Kiyotoshi Noheji | 2012-08-21 |