Issued Patents All Time
Showing 1–25 of 47 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 11476946 | Signal processing device and transmission device | Yoshitaka Nomura, Hisao Nakashima, Daisuke Sasaki, Yasuo Ohtomo | 2022-10-18 |
| 11159352 | Adaptive equalizer, optical receiver, and optical transmission system | Daisuke Sasaki, Hisao Nakashima | 2021-10-26 |
| 11146428 | Adaptive equalizer, optical receiver, and adaptive equalization method | Daisuke Sasaki, Hisao Nakashima | 2021-10-12 |
| 10931485 | Adaptive equalization circuit and optical receiver | Yuya IMOTO, Kazuhiko Hatae, Yasuo Ohtomo, Masashi Sato, Daisuke Sasaki | 2021-02-23 |
| 10560199 | Signal processing circuit and optical receiving device | Yuya IMOTO, Kazuhiko Hatae, Yasuo Ohtomo, Masato Oota, Masashi Sato +1 more | 2020-02-11 |
| 10177855 | Amplitude adjustment circuit, digital coherent receiver, and amplitude adjustment method | Masashi Sato, Kazuhiko Hatae, Yasuo Ohtomo, Masato Oota, Daisuke Sasaki +1 more | 2019-01-08 |
| 9680667 | Adaptive equalization circuit, digital coherent receiver, and adaptive equalization method | Daisuke Sasaki, Kazuhiko Hatae, Tomoki Katou, Masato Oota, Yasuo Ohtomo +2 more | 2017-06-13 |
| 9660733 | Signal processing apparatus, signal processing method, and signal processing system | Masashi Sato, Kazuhiko Hatae, Tomoki Katou, Masato Oota, Yasuo Ohtomo +2 more | 2017-05-23 |
| 9496966 | Optical communication receiving device and frequency offset compensation method | Kazuhiko Hatae, Koji Nakamuta, Manabu Yamazaki, Tomoki Katou, Masashi Sato +1 more | 2016-11-15 |
| 9444554 | Digital coherent receiving apparatus | Takeshi Hoshida, Takahito Tanimura, Hisao Nakashima, Koji Nakamuta, Noriyasu Nakayama | 2016-09-13 |
| 9407471 | Adaptive equalizer tap coefficient correction method and optical receiver | Taku Saito, Hisao Nakashima, Osamu Takeuchi, Hirofumi Araki | 2016-08-02 |
| 8861980 | Loop filter | Yasuo Ohtomo | 2014-10-14 |
| 8693898 | Adaptive equalizer, optical receiver, and tap coefficient correcting method | Kazuhiko Hatae, Noriyasu Nakayama, Koji Nakamuta, Hisao Nakashima, Kosuke Komaki | 2014-04-08 |
| 8649689 | Digital coherent receiving apparatus | Takeshi Hoshida, Takahito Tanimura, Hisao Nakashima, Koji Nakamuta, Noriyasu Nakayama | 2014-02-11 |
| 8606118 | Optical digital coherent receiver | Kazuhiko Hatae, Noriyasu Nakayama, Yuji Obana | 2013-12-10 |
| 8428927 | Simulation method and simulation apparatus | Noriyasu Nakayama, Tomoki Kato, Naoki Yuzawa, Hiroyuki Hieda, Satoshi Hiramoto | 2013-04-23 |
| 8264902 | Memory control method and memory control device | Shizuko Maruyama | 2012-09-11 |
| 8214189 | Performance evaluation simulation | Tomoki Kato, Noriyasu Nakayama, Naoki Yuzawa, Hiroyuki Hieda, Satoshi Hiramoto | 2012-07-03 |
| 7555055 | Digital subscriber line communicating system | Seiji Miyoshi, Yutaka Awata, Hiroyasu Murata, Takashi Sasaki | 2009-06-30 |
| 7434311 | Printed wiring board manufacturing method | — | 2008-10-14 |
| 7423984 | Digital subscriber line transmission method, apparatus and system | Kazutomo Hasegawa, Hidetake Asahina, Seiji Miyoshi, Yutaka Awata | 2008-09-09 |
| 7417792 | Optical amplification device | Kazuhiko Hatae, Masato Oota | 2008-08-26 |
| 7388711 | Controlling apparatus for optical amplifier and controlling method thereof | Masato Oota, Yohei Koganei | 2008-06-17 |
| 7386037 | Digital subscriber line communicating system | Seiji Miyoshi, Yutaka Awata, Hiroyasu Murata, Takashi Sasaki | 2008-06-10 |
| 7336627 | Digital subscriber line transmission method, apparatus and system | Kazutomo Hasegawa, Hidetake Asahina, Seiji Miyoshi, Yutaka Awata | 2008-02-26 |