Issued Patents All Time
Showing 1–25 of 54 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 11742978 | Optical network device and method for monitoring transmission line | Kazuyuki Tajima, Setsuo Yoshida, Eri Katayama, Kiichi Sugitani | 2023-08-29 |
| 11558121 | Optical transmitter and control method for optical transmitter | Setsuo Yoshida, Shoichiro Oda, Kazuyuki Tajima, Takeshi Hoshida | 2023-01-17 |
| 11228367 | Communication device and communication method | Takeshi Hoshida | 2022-01-18 |
| 11146332 | Transmission line monitoring device and transmission line monitoring method | Setsuo Yoshida | 2021-10-12 |
| 10999659 | Optical network device and method for monitoring transmission line | Kazuyuki Tajima, Setsuo Yoshida, Takeshi Hoshida | 2021-05-04 |
| 10972178 | Parameter analysis method and apparatus | — | 2021-04-06 |
| 10853719 | Data collecting device and optical transmission system | Takeshi Hoshida | 2020-12-01 |
| 10720992 | Transmission apparatus, reception apparatus, and method for estimating characteristics of transmission line | Takeshi Hoshida, Shigeki Watanabe, Tomoyuki Kato | 2020-07-21 |
| 10554325 | Receiver and receiving method | Tomohiro Yamauchi, Takeshi Hoshida, Rafael Puerta Ramirez | 2020-02-04 |
| 10425166 | Optical transmitter, optical transmission apparatus, and optical modulation method | Tomohiro Yamauchi, Tomofumi Oyama, GUOXIU HUANG, Takeshi Hoshida | 2019-09-24 |
| 10419117 | Monitor device and monitor method for monitoring transmission line | Takeshi Hoshida | 2019-09-17 |
| 10313017 | Optical transmitter, optical receiver and optical transmission method | Takeshi Hoshida | 2019-06-04 |
| 10277328 | Signal processing device used in optical receiver and signal processing method | Tomofumi Oyama, Hisao Nakashima, Yoshitaka Nomura, Takeshi Hoshida | 2019-04-30 |
| 10193621 | Location measurement apparatus, light modulation converter, and light variation location measurement method | Tomoyuki Kato, Shigeki Watanabe, Takeshi Hoshida | 2019-01-29 |
| 9787396 | Optical transmission device, transmission system, and transmission method | Kiichi Sugitani, Hisao Nakashima, Yuichi Akiyama | 2017-10-10 |
| 9654224 | Optical transmission device, nonlinear distortion compensation method, and nonlinear distortion pre-equalization method | Tomofumi Oyama, Takeshi Hoshida, Hisao Nakashima, Yuichi Akiyama | 2017-05-16 |
| 9654216 | Optical transmitter and waveform distortion correction method | Hisao Nakashima, Yuichi Akiyama | 2017-05-16 |
| 9634787 | Optical add-drop multiplexer | Shigeki Watanabe, Tomoyuki Kato | 2017-04-25 |
| 9571224 | Transmission device, receiving device, and communication method | — | 2017-02-14 |
| 9553674 | Optical transmitter and method of optical transmission | Takeshi Hoshida | 2017-01-24 |
| 9467228 | Optical transmission system and optical transmission method | Hisao Nakashima, Takeshi Hoshida | 2016-10-11 |
| 9444554 | Digital coherent receiving apparatus | Nobukazu Koizumi, Takeshi Hoshida, Hisao Nakashima, Koji Nakamuta, Noriyasu Nakayama | 2016-09-13 |
| 9363014 | Non-linear distortion compensator, method of compensating non-linear distortion, and optical receiver | Tomofumi Oyama, Hisao Nakashima | 2016-06-07 |
| 9356689 | Optical transmitter and optical signal transmission method | Takeshi Hoshida, Masato Nishihara | 2016-05-31 |
| 9225459 | Optical transmission system, optical transmission apparatus, signal conditioning program, and signal conditioning method | Shoichiro Oda, Takeshi Hoshida, Hisao Nakashima, Yasuhiko Aoki | 2015-12-29 |