Issued Patents All Time
Showing 1–25 of 35 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 12021568 | Optical receiver | Yusuke SHIGETA | 2024-06-25 |
| 11888526 | Optical transmitter, communication apparatus, and method of controlling bias voltage of electro-optic modulator | Shoichi Murakami, Hidetoshi Sato, Yuya Osumi, Yusuke SHIGETA | 2024-01-30 |
| 11223385 | Optical apparatus and optical receiving method | Shoichi Murakami, Taku Saito | 2022-01-11 |
| 11196485 | Network system, management device, and network design method | Taizo Maeda | 2021-12-07 |
| 10715363 | Optical communication apparatus, server apparatus, and optical transport system | Naoya Okada, Taizo Maeda | 2020-07-14 |
| 10491307 | Optical transmitter | Shuzo Matsushita, Taku Saito, Masamichi Sugamoto, Hironobu Hongou | 2019-11-26 |
| 10020879 | Optical transmission apparatus, optical power monitor, and method of monitoring optical power | Taku Saito, Taketo Endo | 2018-07-10 |
| 9882647 | Optical transmission apparatus, optical transmission system, and polarization dependent loss monitor | Taketo Endo, Taku Saito, Hirofumi Araki, Makoto Shimizu, Hiroshi Nishida | 2018-01-30 |
| 9722704 | Optical transmission apparatus and method for controlling optical power | Taku Saito, Taketo Endo, Shuzo Matsushita, Hirofumi Araki, Hiroshi Nishida +1 more | 2017-08-01 |
| 9698905 | Optical transmission system, optical transmission apparatus and wavelength spacing measurement apparatus | Taku Saito, Taketo Endo | 2017-07-04 |
| 9531496 | Optical transmission device and optical transmission method | Masahiro Yuki, Norifumi Shukunami | 2016-12-27 |
| 9438343 | Transmitting device, communication system, and method for transmission level control | Norifumi Shukunami | 2016-09-06 |
| 9432113 | Optical transmission device | Hiroki Oi | 2016-08-30 |
| 9300426 | Transmission apparatus, transmission system, and method of controlling average optical input power | Yoshinobu Matsukawa, Norifumi Shukunami | 2016-03-29 |
| 9148229 | Optical transmitter, optical receiver, and optical transmission method | — | 2015-09-29 |
| 9014569 | Optical node and optical communication method | Koji Biwa | 2015-04-21 |
| 8989602 | Digital coherent optical receiver, adaptive equalizer, and digital coherent optical communication method | Osamu Takeuchi | 2015-03-24 |
| 8879145 | Raman amplifier | Tomoaki Takeyama, Shingo Hara, Shota Mori | 2014-11-04 |
| 8873973 | Digital coherent receiver and phase control method | Hisao Nakashima | 2014-10-28 |
| 8854727 | Optical amplifier and transmission system | Tomoaki Takeyama | 2014-10-07 |
| 8824902 | Optical receiver, method for receiving optical signal, and optical transmission system | Takeshi Sakamoto | 2014-09-02 |
| 8693898 | Adaptive equalizer, optical receiver, and tap coefficient correcting method | Nobukazu Koizumi, Kazuhiko Hatae, Noriyasu Nakayama, Koji Nakamuta, Hisao Nakashima | 2014-04-08 |
| 8670678 | Digital coherent receiver and digital coherent reception method | Yuichirou Sakamoto | 2014-03-11 |
| 8660438 | Digital coherent receiver and receiving method | Hisao Nakashima, Takeshi Hoshida | 2014-02-25 |
| 8655185 | Optical node, optical network system, and method for measuring polarization mode dispersion | Takeshi Sakamoto, Katsumi Fukumitsu | 2014-02-18 |