Issued Patents All Time
Showing 26–44 of 44 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 10128818 | Data processor, data processing method and communication device | Yasuharu Onuma, Kazuhito Takei, Osamu Ishida, Kengo Horikoshi, Mitsuteru YOSHIDA +2 more | 2018-11-13 |
| 10122465 | Digital signal processing device and optical transceiver apparatus | Osamu Ishida, Kazuhito Takei, Masahito Tomizawa, Hideki Nishizawa | 2018-11-06 |
| 10122462 | Transport apparatus and transport method | Takuya Ohara, Kei Kitamura, Yoshiaki Kisaka, Shigeki Aisawa, Masahiro Suzuki +5 more | 2018-11-06 |
| 10038507 | Optical transmission system, phase compensation method, and optical reception apparatus | Mitsuteru YOSHIDA, Seiji Okamoto, Hiroyuki Uzawa, Kengo Horikoshi, Koichi Ishihara +6 more | 2018-07-31 |
| 9698932 | Optical transmission/reception system, transmitter, receiver, and optical transmission/reception method | Yoshiaki Kisaka, Koichi Ishihara, Masahito Tomizawa | 2017-07-04 |
| 9667350 | Optical receiving device and phase cycle reduction method | Kengo Horikoshi, Kohki Shibahara, Mitsuteru YOSHIDA, Koichi Ishihara, Takayuki Kobayashi +4 more | 2017-05-30 |
| 9621299 | Coherent communication system, communication method, and transmission method | Koichi Ishihara, Masato Mizoguchi, Tomoki Murakami, Tomoyoshi Kataoka, Yoshiaki Kisaka +5 more | 2017-04-11 |
| 9614621 | Signal generating circuit, optical signal transmitting apparatus, signal receiving circuit, method for establishing optical signal synchronization, and optical signal synchronization system | Koichi Ishihara, Takayuki Kobayashi, Riichi Kudo, Yasushi Takatori, Munehiro Matsui +6 more | 2017-04-04 |
| 9520947 | Signal generating circuit, optical signal transmitting apparatus, signal receiving circuit, method for establishing optical signal synchronization, and optical signal synchronization system | Koichi Ishihara, Takayuki Kobayashi, Riichi Kudo, Yasushi Takatori, Munehiro Matsui +6 more | 2016-12-13 |
| 9178614 | Method for estimating amount of wavelength dispersion, wavelength dispersion compensation circuit, and receiving device | Takayuki Kobayashi, Masahito Tomizawa, Riichi Kudo, Koichi Ishihara, Tadao Nakagawa +1 more | 2015-11-03 |
| 9160600 | Method for receiving frequency domain multiplexed signal and device for receiving frequency domain multiplexed signal | Riichi Kudo, Takayuki Kobayashi, Koichi Ishihara, Yasushi Takatori, Hideyuki Nosaka +6 more | 2015-10-13 |
| 8977141 | Digital signal processing apparatus | Kengo Horikoshi, Takayuki Kobayashi, Eiji Yoshida, Yutaka Miyamoto | 2015-03-10 |
| 8971703 | Wavelength dispersion amount estimation method, wavelength dispersion compensation circuit, and reception device | Takayuki Kobayashi, Masahito Tomizawa, Riichi Kudo, Koichi Ishihara, Tadao Nakagawa +1 more | 2015-03-03 |
| 8934782 | Transmission method, reception method, transmitter apparatus, and receiver device | Tadao Nakagawa, Koichi Ishihara, Takayuki Kobayashi, Riichi Kudo, Yasushi Takatori +5 more | 2015-01-13 |
| 8929750 | Signal generating circuit, optical signal transmitting apparatus, signal receiving circuit, method for establishing optical signal synchronization, and optical signal synchronization system | Koichi Ishihara, Takayuki Kobayashi, Riichi Kudo, Yasushi Takatori, Munehiro Matsui +6 more | 2015-01-06 |
| 8855485 | Frequency offset estimating method and frequency offset estimating apparatus | Tadao Nakagawa, Yasushi Takatori, Riichi Kudo, Munehiro Matsui, Koichi Ishihara +5 more | 2014-10-07 |
| 8787769 | Chromatic dispersion value calculating apparatus, optical signal receiving apparatus, optical signal transmitting apparatus, and chromatic dispersion value calculation method | Koichi Ishihara, Takayuki Kobayashi, Riichi Kudo, Yasushi Takatori, Munehiro Matsui +6 more | 2014-07-22 |
| 8781029 | Frequency offset estimation apparatus, reception apparatus, frequency offset estimation method, and reception method | Tadao Nakagawa, Munehiro Matsui, Koichi Ishihara, Riichi Kudo, Takayuki Kobayashi +5 more | 2014-07-15 |
| 8488696 | Receiver device, communication system and receiving method | Koichi Ishihara, Takayuki Kobayashi, Riichi Kudo, Yasushi Takatori, Munehiro Matsui +5 more | 2013-07-16 |