Issued Patents All Time
Showing 1–14 of 14 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 10931485 | Adaptive equalization circuit and optical receiver | Yuya IMOTO, Nobukazu Koizumi, Yasuo Ohtomo, Masashi Sato, Daisuke Sasaki | 2021-02-23 |
| 10560199 | Signal processing circuit and optical receiving device | Yuya IMOTO, Nobukazu Koizumi, Yasuo Ohtomo, Masato Oota, Masashi Sato +1 more | 2020-02-11 |
| 10177855 | Amplitude adjustment circuit, digital coherent receiver, and amplitude adjustment method | Masashi Sato, Nobukazu Koizumi, Yasuo Ohtomo, Masato Oota, Daisuke Sasaki +1 more | 2019-01-08 |
| 9680667 | Adaptive equalization circuit, digital coherent receiver, and adaptive equalization method | Daisuke Sasaki, Tomoki Katou, Nobukazu Koizumi, Masato Oota, Yasuo Ohtomo +2 more | 2017-06-13 |
| 9660733 | Signal processing apparatus, signal processing method, and signal processing system | Masashi Sato, Tomoki Katou, Nobukazu Koizumi, Masato Oota, Yasuo Ohtomo +2 more | 2017-05-23 |
| 9496966 | Optical communication receiving device and frequency offset compensation method | Nobukazu Koizumi, Koji Nakamuta, Manabu Yamazaki, Tomoki Katou, Masashi Sato +1 more | 2016-11-15 |
| 9401765 | Frequency offset estimation circuit and frequency offset estimation method | Nobuaki Kawasoe, Manabu Yamazaki | 2016-07-26 |
| 9374170 | Optical receiving device | Masato Oota, Tomoki Katou, Hisao Nakashima, Manabu Yamazaki | 2016-06-21 |
| 8693898 | Adaptive equalizer, optical receiver, and tap coefficient correcting method | Nobukazu Koizumi, Noriyasu Nakayama, Koji Nakamuta, Hisao Nakashima, Kosuke Komaki | 2014-04-08 |
| 8677296 | Circuit design support computer product, method, and apparatus | — | 2014-03-18 |
| 8606118 | Optical digital coherent receiver | Noriyasu Nakayama, Nobukazu Koizumi, Yuji Obana | 2013-12-10 |
| 8392485 | Signal waveform generating circuit and method | — | 2013-03-05 |
| 7649482 | Signal modulation method, signal modulation apparatus, electronic device, and computer program product | Yasuo Ohtomo, Masashi Sato, Yutaka Awata | 2010-01-19 |
| 7417792 | Optical amplification device | Nobukazu Koizumi, Masato Oota | 2008-08-26 |