Issued Patents All Time
Showing 1–13 of 13 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 11476946 | Signal processing device and transmission device | Yoshitaka Nomura, Hisao Nakashima, Nobukazu Koizumi, Daisuke Sasaki | 2022-10-18 |
| 10931485 | Adaptive equalization circuit and optical receiver | Yuya IMOTO, Kazuhiko Hatae, Nobukazu Koizumi, Masashi Sato, Daisuke Sasaki | 2021-02-23 |
| 10560199 | Signal processing circuit and optical receiving device | Yuya IMOTO, Kazuhiko Hatae, Nobukazu Koizumi, Masato Oota, Masashi Sato +1 more | 2020-02-11 |
| 10177855 | Amplitude adjustment circuit, digital coherent receiver, and amplitude adjustment method | Masashi Sato, Kazuhiko Hatae, Nobukazu Koizumi, 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, Nobukazu Koizumi, Masato Oota +2 more | 2017-06-13 |
| 9660733 | Signal processing apparatus, signal processing method, and signal processing system | Masashi Sato, Kazuhiko Hatae, Tomoki Katou, Nobukazu Koizumi, Masato Oota +2 more | 2017-05-23 |
| 8861980 | Loop filter | Nobukazu Koizumi | 2014-10-14 |
| 7649482 | Signal modulation method, signal modulation apparatus, electronic device, and computer program product | Kazuhiko Hatae, Masashi Sato, Yutaka Awata | 2010-01-19 |
| 7539670 | Data search system and method for displaying data search results | — | 2009-05-26 |
| 6910031 | Data search system and method for displaying data search results | — | 2005-06-21 |
| 6647398 | Data managing method and apparatus, and recording medium | Takashi Ishizaka, Takayuki Ooi, Ayako Ohtomo, Shingo Ooya, Tsutomu Kageyama | 2003-11-11 |
| 5638409 | Data receiving device for reproducing a received symbol from a received data signal | Yutaka Awata, Nobukazu Koizumi, Mitsuo Kakuishi | 1997-06-10 |
| 5399985 | Digital PLL circuit | Yutaka Awata, Nobukazu Koizumi, Mitsuo Kakuishi | 1995-03-21 |