Issued Patents All Time
Showing 1–25 of 44 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 12224889 | Adaptive equalization filter and method for updating filter coefficients | Seiji Okamoto, Masanori Nakamura, Kengo Horikoshi, Takeo SASAI, Yoshiaki Kisaka | 2025-02-11 |
| 12224797 | Optical wireless communication device and optical wireless communication method | Kazumitsu SAKAMOTO, Yohei Katayama, Kento YOSHIZAWA, Takeshi Kinoshita, Takayuki Mizuno +1 more | 2025-02-11 |
| 12206450 | Phase difference distribution estimation method and phase difference distribution estimation apparatus | Yohei Katayama, Kazumitsu SAKAMOTO, Kento YOSHIZAWA, Hiroyuki Fukumoto, Takuya Ohara +2 more | 2025-01-21 |
| 12206458 | Communication apparatus and optical communication system | Yohei Katayama, Kazumitsu SAKAMOTO, Kento YOSHIZAWA, Hiroyuki Fukumoto, Takuya Ohara +2 more | 2025-01-21 |
| 12149285 | Optical wireless communication system and optical wireless communication method | Kazumitsu SAKAMOTO, Yohei Katayama, Kento YOSHIZAWA, Takeshi Kinoshita, Takayuki Mizuno +1 more | 2024-11-19 |
| 11799547 | Signal processing apparatus, signal processing method, and program | Kengo Horikoshi, Masanori Nakamura, Seiji Okamoto, Hideki Nishizawa | 2023-10-24 |
| 11671119 | Signal processing apparatus and signal processing method | Seiji Okamoto, Masanori Nakamura, Yoshiaki Kisaka, Masahito Tomizawa | 2023-06-06 |
| 11349572 | Optical transmission system, optical transmitting apparatus, and optical receiving apparatus | Masanori Nakamura, Seiji Okamoto, Yoshiaki Kisaka | 2022-05-31 |
| 11329764 | Error correction device, error correction method, and optical communication system | Fumiaki Nakagawa, Yasuharu Onuma, Katsuichi Oyama, Yasuyuki Endoh, Yoshiaki Kisaka +1 more | 2022-05-10 |
| 11323238 | Frame synchronization apparatus, optical communication apparatus, and frame synchronization method | Mitsuteru YOSHIDA, Yasuyuki Endoh, Katsuichi Oyama, Masayuki Ikeda, Tsutomu Takeya +2 more | 2022-05-03 |
| 11316588 | Wavelength dispersion compensation apparatus, wavelength dispersion compensation method, and optical receiving apparatus | Kyo MINOGUCHI, Seiji Okamoto, Yoshiaki Kisaka | 2022-04-26 |
| 11251870 | Optical transmission system | Yoshiaki Kisaka | 2022-02-15 |
| 11201721 | Frame synchronization apparatus, optical communication apparatus, and frame synchronization method | Mitsuteru YOSHIDA, Yasuyuki Endoh, Katsuichi Oyama, Masayuki Ikeda, Tsutomu Takeya +2 more | 2021-12-14 |
| 10880193 | Error correction device, error correction method, and communication device | Mitsuteru YOSHIDA, Yasuyuki Endo, Katsuichi Oyama, Yasuharu Onuma, Masahito Tomizawa | 2020-12-29 |
| 10868617 | Chromatic dispersion compensation device, chromatic dispersion compensation method, and communication device | Mitsuteru YOSHIDA, Yoshiaki Kisaka, Masahito Tomizawa | 2020-12-15 |
| 10685095 | Processing equipment and remote management system | Osamu Ishida, Kazuhito Takei, Yasuhiro Suzuki, Hideki Nishizawa | 2020-06-16 |
| 10608743 | Transmission characteristic compensation apparatus, transmission characteristic compensation method, and communication apparatus | Tomohiro Takamuku, Katsuichi Oyama, Yasuharu Onuma, Kazuhito Takei, Masanori Nakamura +3 more | 2020-03-31 |
| 10523335 | Known signal detection method | Yasuharu Onuma, Tomohiro Takamuku, Masahiro Tachibana, Mitsuteru YOSHIDA, Masahito Tomizawa +1 more | 2019-12-31 |
| 10422719 | Chromatic dispersion estimating circuit, optical reception device and chromatic dispersion amount estimating method | Tomohiro Takamuku, Yuki Yoshida, Mitsuteru YOSHIDA, Koki Shibahara, Kengo Horikoshi +1 more | 2019-09-24 |
| 10419127 | Phase compensation device, phase compensation method and communication apparatus | Hiroyukl Nouchi, Yasuharu Onuma, Tomohiro Takamuku, Katsuichi Oyama, Kazuhito Takei +4 more | 2019-09-17 |
| 10396895 | Compensation coefficient calculation method | Tomohiro Takamuku, Yuki Yoshida, Katsuichi Oyama, Yasuharu Onuma, Akihiro Yamagishi | 2019-08-27 |
| 10389452 | Coherent optical reception device | Kengo Horikoshi, Mitsuteru YOSHIDA, Seiji Okamoto, Eiichi Hosoya, Yasuharu Onuma +3 more | 2019-08-20 |
| 10374718 | Optical transmission distortion compensation device, optical transmission distortion compensation method, and communication device | Yasuharu Onuma, Hiroyuki Nouchi, Tomohiro Takamuku, Katsuichi Oyama, Kazuhito Takei +3 more | 2019-08-06 |
| 10305675 | Data phase tracking device, data phase tracking method and communication device | Yasuharu Onuma, Masahiro Tachibana, Kazuhito Takei, Yuki Yoshida, Masayuki Ikeda +2 more | 2019-05-28 |
| 10171173 | Optical signal transmission apparatus and optical signal transmission method | Seiji Okamoto, Koichi Ishihara, Mitsuteru YOSHIDA, Tomoyoshi Kataoka, Kazushige Yonenaga +3 more | 2019-01-01 |