Issued Patents All Time
Showing 26–50 of 55 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 11283528 | Digital coherent receiver and digital coherent receiving method | Akira Masuda, Seiji Okamoto, Shuto Yamamoto, Fukutaro HAMAOKA, Masanori Nakamura +1 more | 2022-03-22 |
| 11251870 | Optical transmission system | Etsushi Yamazaki | 2022-02-15 |
| 11245487 | Optical transmission control method and optical transmission system | Fukutaro HAMAOKA, Kyo MINOGUCHI, Seiji Okamoto | 2022-02-08 |
| 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 |
| 10868617 | Chromatic dispersion compensation device, chromatic dispersion compensation method, and communication device | Mitsuteru YOSHIDA, Etsushi Yamazaki, Masahito Tomizawa | 2020-12-15 |
| 10841006 | Signal-to-noise ratio estimation method, optical transmission apparatus, and optical transmission system | Seiji Okamoto, Kengo Horikoshi, Mitsuteru YOSHIDA, Masahiro Suzuki | 2020-11-17 |
| 10826620 | Optical receiver, optical reception method, and optical communication system | Fukutaro HAMAOKA, Seiji Okamoto, Masanori Nakamura, Kengo Horikoshi | 2020-11-03 |
| 10651944 | Optical transmitter, optical receiver, optical data transmission system, optical transmission method, and optical reception method | Kengo Horikoshi, Seiji Okamoto, Asuka Matsushita, Mitsuteru YOSHIDA, Fukutaro HAMAOKA +1 more | 2020-05-12 |
| 10608743 | Transmission characteristic compensation apparatus, transmission characteristic compensation method, and communication apparatus | Tomohiro Takamuku, Etsushi Yamazaki, Katsuichi Oyama, Yasuharu Onuma, Kazuhito Takei +3 more | 2020-03-31 |
| 10422719 | Chromatic dispersion estimating circuit, optical reception device and chromatic dispersion amount estimating method | Etsushi Yamazaki, Tomohiro Takamuku, Yuki Yoshida, Mitsuteru YOSHIDA, Koki Shibahara +1 more | 2019-09-24 |
| 10419127 | Phase compensation device, phase compensation method and communication apparatus | Etsushi Yamazaki, Hiroyukl Nouchi, Yasuharu Onuma, Tomohiro Takamuku, Katsuichi Oyama +4 more | 2019-09-17 |
| 10305675 | Data phase tracking device, data phase tracking method and communication device | Yasuharu Onuma, Masahiro Tachibana, Etsushi Yamazaki, Kazuhito Takei, Yuki Yoshida +2 more | 2019-05-28 |
| 10171173 | Optical signal transmission apparatus and optical signal transmission method | Seiji Okamoto, Koichi Ishihara, Etsushi Yamazaki, Mitsuteru YOSHIDA, Tomoyoshi Kataoka +3 more | 2019-01-01 |
| 10128818 | Data processor, data processing method and communication device | Yasuharu Onuma, Etsushi Yamazaki, Kazuhito Takei, Osamu Ishida, Kengo Horikoshi +2 more | 2018-11-13 |
| 10122462 | Transport apparatus and transport method | Takuya Ohara, Kei Kitamura, Shigeki Aisawa, Masahiro Suzuki, Etsushi Yamazaki +5 more | 2018-11-06 |
| 10038507 | Optical transmission system, phase compensation method, and optical reception apparatus | Mitsuteru YOSHIDA, Etsushi Yamazaki, Seiji Okamoto, Hiroyuki Uzawa, Kengo Horikoshi +6 more | 2018-07-31 |
| 9698932 | Optical transmission/reception system, transmitter, receiver, and optical transmission/reception method | Koichi Ishihara, Masahito Tomizawa, Etsushi Yamazaki | 2017-07-04 |
| 9667350 | Optical receiving device and phase cycle reduction method | Kengo Horikoshi, Kohki Shibahara, Etsushi Yamazaki, Mitsuteru YOSHIDA, Koichi Ishihara +4 more | 2017-05-30 |
| 9621299 | Coherent communication system, communication method, and transmission method | Koichi Ishihara, Masato Mizoguchi, Tomoki Murakami, Tomoyoshi Kataoka, Tadao Nakagawa +5 more | 2017-04-11 |
| 9336080 | Transmission system and transmission method | Akira Hirano, Mitsunori Fukutoku, Yoshiaki Sone, Akihiro Kadohata, Takafumi Tanaka | 2016-05-10 |
| 9054894 | Signal block sequence processing method and signal block sequence processing apparatus | Shoukei Kobayashi, Mitsuhiro Teshima, Takehito Yamamoto, Osamu Ishida | 2015-06-09 |
| 8571037 | Optical digital transmission system | Shigeki Aisawa, Masahito Tomizawa, Yutaka Miyamoto, Yasuyuki Endo, Katsuyoshi Miura +1 more | 2013-10-29 |
| 8514881 | Digital transmission system and digital transmission method | Takuya Ohara, Shigeki Aisawa, Yutaka Miyamoto, Kazuhito Takei, Yasuyuki Endoh +3 more | 2013-08-20 |
| 8406360 | Signal generating method for clock recovery and clock recovery circuit | Yasuyuki Endoh, Kazuhito Takei, Katuyoshi Miura, Tadanobu Nikaido | 2013-03-26 |
| 8135285 | Optical transmission system and method | Shigeki Aisawa, Yutaka Miyamoto, Masahito Tomizawa, Yasuyuki Endoh, Kazuhito Takei | 2012-03-13 |