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Etsushi YAMAZAKI
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Yokosuka-shi, JP
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Patents Grants
last 30 patents
Information
Patent Grant
Optical wireless communication system and optical wireless communic...
Patent number
12,149,285
Issue date
Nov 19, 2024
Nippon Telegraph and Telephone Corporation
Kazumitsu Sakamoto
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Signal processing apparatus, signal processing method, and program
Patent number
11,799,547
Issue date
Oct 24, 2023
Nippon Telegraph and Telephone Corporation
Kengo Horikoshi
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Signal processing apparatus and signal processing method
Patent number
11,671,119
Issue date
Jun 6, 2023
Nippon Telegraph and Telephone Corporation
Seiji Okamoto
H03 - BASIC ELECTRONIC CIRCUITRY
Information
Patent Grant
Optical transmission system, optical transmitting apparatus, and op...
Patent number
11,349,572
Issue date
May 31, 2022
Nippon Telegraph and Telephone Corporation
Masanori Nakamura
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Error correction device, error correction method, and optical commu...
Patent number
11,329,764
Issue date
May 10, 2022
NTT Electronics Corporation
Fumiaki Nakagawa
H03 - BASIC ELECTRONIC CIRCUITRY
Information
Patent Grant
Frame synchronization apparatus, optical communication apparatus, a...
Patent number
11,323,238
Issue date
May 3, 2022
NTT Electronics Corporation
Mitsuteru Yoshida
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Wavelength dispersion compensation apparatus, wavelength dispersion...
Patent number
11,316,588
Issue date
Apr 26, 2022
Nippon Telegraph and Telephone Corporation
Kyo Minoguchi
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Optical transmission system
Patent number
11,251,870
Issue date
Feb 15, 2022
Nippon Telegraph and Telephone Corporation
Etsushi Yamazaki
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Frame synchronization apparatus, optical communication apparatus, a...
Patent number
11,201,721
Issue date
Dec 14, 2021
NTT Electronics Corporation
Mitsuteru Yoshida
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Error correction device, error correction method, and communication...
Patent number
10,880,193
Issue date
Dec 29, 2020
NTT Electronics Corporation
Mitsuteru Yoshida
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Chromatic dispersion compensation device, chromatic dispersion comp...
Patent number
10,868,617
Issue date
Dec 15, 2020
NTT Electronics Corporation
Mitsuteru Yoshida
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Processing equipment and remote management system
Patent number
10,685,095
Issue date
Jun 16, 2020
NTT Electronics Corporation
Etsushi Yamazaki
G06 - COMPUTING CALCULATING COUNTING
Information
Patent Grant
Transmission characteristic compensation apparatus, transmission ch...
Patent number
10,608,743
Issue date
Mar 31, 2020
NTT Electronics Corporation
Tomohiro Takamuku
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Known signal detection method
Patent number
10,523,335
Issue date
Dec 31, 2019
NTT Electronics Corporation
Yasuharu Onuma
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Chromatic dispersion estimating circuit, optical reception device a...
Patent number
10,422,719
Issue date
Sep 24, 2019
NTT Electronics Corporation
Etsushi Yamazaki
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Phase compensation device, phase compensation method and communicat...
Patent number
10,419,127
Issue date
Sep 17, 2019
NTT Electronics Corporation
Etsushi Yamazaki
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Compensation coefficient calculation method
Patent number
10,396,895
Issue date
Aug 27, 2019
NTT Electronics Corporation
Tomohiro Takamuku
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Coherent optical reception device
Patent number
10,389,452
Issue date
Aug 20, 2019
Nippon Telegraph and Telephone Corporation
Kengo Horikoshi
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Optical transmission distortion compensation device, optical transm...
Patent number
10,374,718
Issue date
Aug 6, 2019
NTT Electronics Corporation
Yasuharu Onuma
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Data phase tracking device, data phase tracking method and communic...
Patent number
10,305,675
Issue date
May 28, 2019
NTT Electronics Corporation
Yasuharu Onuma
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Optical signal transmission apparatus and optical signal transmissi...
Patent number
10,171,173
Issue date
Jan 1, 2019
Nippon Telegraph and Telephone Corporation
Seiji Okamoto
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Data processor, data processing method and communication device
Patent number
10,128,818
Issue date
Nov 13, 2018
NTT Electronics Corporation
Yasuharu Onuma
H03 - BASIC ELECTRONIC CIRCUITRY
Information
Patent Grant
Digital signal processing device and optical transceiver apparatus
Patent number
10,122,465
Issue date
Nov 6, 2018
NTT Electronics Corporation
Osamu Ishida
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Transport apparatus and transport method
Patent number
10,122,462
Issue date
Nov 6, 2018
Nippon Telegraph and Telephone Corporation
Takuya Ohara
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Optical transmission system, phase compensation method, and optical...
Patent number
10,038,507
Issue date
Jul 31, 2018
Nippon Telegraph and Telephone Corporation
Mitsuteru Yoshida
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Optical transmission/reception system, transmitter, receiver, and o...
Patent number
9,698,932
Issue date
Jul 4, 2017
Nippon Telegraph and Telephone Corporation
Yoshiaki Kisaka
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Optical receiving device and phase cycle reduction method
Patent number
9,667,350
Issue date
May 30, 2017
Nippon Telegraph and Telephone Corporation
Kengo Horikoshi
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Coherent communication system, communication method, and transmissi...
Patent number
9,621,299
Issue date
Apr 11, 2017
Nippon Telegraph and Telephone Corporation
Koichi Ishihara
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Signal generating circuit, optical signal transmitting apparatus, s...
Patent number
9,614,621
Issue date
Apr 4, 2017
Nippon Telegraph and Telephone Corporation
Koichi Ishihara
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Signal generating circuit, optical signal transmitting apparatus, s...
Patent number
9,520,947
Issue date
Dec 13, 2016
Nippon Telegraph and Telephone Corporation
Koichi Ishihara
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Patents Applications
last 30 patents
Information
Patent Application
FREQUENCY OFFSET ESTIMATION APPARATUS, RECEIVING APPARATUS, FREQUEN...
Publication number
20240187107
Publication date
Jun 6, 2024
Nippon Telegraph and Telephone Corporation
Kengo HORIKOSHI
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Application
OPTICAL SIGNAL CONTROLLER, OPTICAL SIGNAL CONTROL METHOD, AND OPTIC...
Publication number
20240146420
Publication date
May 2, 2024
Nippon Telegraph and Telephone Corporation
Masanori NAKAMURA
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Application
OPTICAL SIGNAL EMITTING DIRECTION CONTROL APPARATUS AND OPTICAL SIG...
Publication number
20240072892
Publication date
Feb 29, 2024
Nippon Telegraph and Telephone Corporation
Kento YOSHIZAWA
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Application
WIRELESS COMMUNICATION APPARATUS, WIRELESS COMMUNICATION SYSTEM AND...
Publication number
20240048250
Publication date
Feb 8, 2024
Nippon Telegraph and Telephone Corporation
Kazumitsu SAKAMOTO
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Application
ADAPTIVE EQUALIZATION FILTER AND METHOD FOR UPDATING FILTER COEFFIC...
Publication number
20230421420
Publication date
Dec 28, 2023
Nippon Telegraph and Telephone Corporation
Etsushi YAMAZAKI
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Application
PHASE DIFFERENCE DISTRIBUTION ESTIMATION METHOD AND PHASE DIFFERENC...
Publication number
20230291471
Publication date
Sep 14, 2023
Nippon Telegraph and Telephone Corporation
Yohei KATAYAMA
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Application
COMMUNICATION APPARATUS AND OPTICAL COMMUNICATION SYSTEM
Publication number
20230291479
Publication date
Sep 14, 2023
Nippon Telegraph and Telephone Corporation
Yohei KATAYAMA
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Application
OPTICAL WIRELESS COMMUNICATION DEVICE AND OPTICAL WIRELESS COMMUNIC...
Publication number
20230224036
Publication date
Jul 13, 2023
Nippon Telegraph and Telephone Corporation
Kazumitsu SAKAMOTO
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Application
OPTICAL WIRELESS COMMUNICATION SYSTEM AND OPTICAL WIRELESS COMMUNIC...
Publication number
20230208521
Publication date
Jun 29, 2023
Nippon Telegraph and Telephone Corporation
Kazumitsu SAKAMOTO
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Application
OPTICAL RECEIVING APPARATUS AND OPTICAL RECEIVING METHOD
Publication number
20230097741
Publication date
Mar 30, 2023
Nippon Telegraph and Telephone Corporation
Kengo HORIKOSHI
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Application
SIGNAL PROCESSING APPARATUS, SIGNAL PROCESSING METHOD, AND PROGRAM
Publication number
20220303003
Publication date
Sep 22, 2022
Nippon Telegraph and Telephone Corporation
Kengo HORIKOSHI
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Application
WAVELENGTH DISPERSION COMPENSATION APPARATUS, WAVELENGTH DISPERSION...
Publication number
20220038180
Publication date
Feb 3, 2022
Nippon Telegraph and Telephone Corporation
Kyo MINOGUCHI
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Application
OPTICAL TRANSMISSION SYSTEM, OPTICAL TRANSMITTING APPARATUS, AND OP...
Publication number
20210367675
Publication date
Nov 25, 2021
Nippon Telegraph and Telephone Corporation
Masanori NAKAMURA
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Application
FRAME SYNCHRONIZATION APPARATUS, OPTICAL COMMUNICATION APPARATUS, A...
Publication number
20210273777
Publication date
Sep 2, 2021
NTT ELECTRONICS CORPORATION
Mitsuteru YOSHIDA
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Application
OPTICAL TRANSMISSION SYSTEM
Publication number
20210242942
Publication date
Aug 5, 2021
Nippon Telegraph and Telephone Corporation
Etsushi YAMAZAKI
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Application
SIGNAL PROCESSING APPARATUS AND SIGNAL PROCESSING METHOD
Publication number
20210203363
Publication date
Jul 1, 2021
Nippon Telegraph and Telephone Corporation
Seiji OKAMOTO
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Application
FRAME SYNCHRONIZATION APPARATUS, OPTICAL COMMUNICATION APPARATUS, A...
Publication number
20210167939
Publication date
Jun 3, 2021
NTT Electronics Corporation
Mitsuteru YOSHIDA
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Application
ERROR CORRECTION DEVICE, ERROR CORRECTION METHOD, AND OPTICAL COMMU...
Publication number
20210075541
Publication date
Mar 11, 2021
NTT ELECTRONICS CORPORATION
Fumiaki NAKAGAWA
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Application
CHROMATIC DISPERSION COMPENSATION DEVICE, CHROMATIC DISPERSION COMP...
Publication number
20200067598
Publication date
Feb 27, 2020
NTT ELECTRONICS CORPORATION
Mitsuteru YOSHIDA
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Application
ERROR CORRECTION DEVICE, ERROR CORRECTION METHOD, AND COMMUNICATION...
Publication number
20200028767
Publication date
Jan 23, 2020
NTT ELECTRONICS CORPORATION
Mitsuteru YOSHIDA
H03 - BASIC ELECTRONIC CIRCUITRY
Information
Patent Application
KNOWN SIGNAL DETECTION METHOD
Publication number
20190165868
Publication date
May 30, 2019
NTT ELECTRONICS CORPORATION
Yasuharu ONUMA
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Application
OPTICAL TRANSMISSION DISTORTION COMPENSATION DEVICE, OPTICAL TRANSM...
Publication number
20190132051
Publication date
May 2, 2019
NTT ELECTRONICS CORPORATION
Yasuharu ONUMA
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Application
TRANSMISSION CHARACTERISTIC COMPENSATION APPARATUS, TRANSMISSION CH...
Publication number
20190074903
Publication date
Mar 7, 2019
NTT ELECTRONICS CORPORATION
Tomohiro TAKAMUKU
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Application
PHASE COMPENSATION DEVICE, PHASE COMPENSATION METHOD AND COMMUNICAT...
Publication number
20190074909
Publication date
Mar 7, 2019
NTT ELECTRONICS CORPORATION
Etsushi YAMAZAKI
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Application
COMPENSATION COEFFICIENT CALCULATION METHOD
Publication number
20190036613
Publication date
Jan 31, 2019
NTT ELECTRONICS CORPORATION
Tomohiro TAKAMUKU
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Application
COHERENT OPTICAL RECEPTION DEVICE
Publication number
20190013876
Publication date
Jan 10, 2019
Nippon Telegraph and Telephone Corporation
Kengo HORIKOSHI
G02 - OPTICS
Information
Patent Application
DATA PHASE TRACKING DEVICE, DATA PHASE TRACKING METHOD AND COMMUNIC...
Publication number
20180302211
Publication date
Oct 18, 2018
NTT ELECTRONICS CORPORATION
Yasuharu ONUMA
H03 - BASIC ELECTRONIC CIRCUITRY
Information
Patent Application
CHROMATIC DISPERSION ESTIMATING CIRCUIT, OPTICAL RECEPTION DEVICE A...
Publication number
20180252614
Publication date
Sep 6, 2018
NTT ELECTRONICS CORPORATION
Etsushi YAMAZAKI
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Application
DATA PROCESSOR, DATA PROCESSING METHOD AND COMMUNICATION DEVICE
Publication number
20180175830
Publication date
Jun 21, 2018
NTT ELECTRONICS CORPORATION
Yasuharu ONUMA
H03 - BASIC ELECTRONIC CIRCUITRY
Information
Patent Application
DIGITAL SIGNAL PROCESSING DEVICE AND OPTICAL TRANSCEIVER APPARATUS
Publication number
20180152247
Publication date
May 31, 2018
NTT ELECTRONICS CORPORATION
Osamu ISHIDA
H04 - ELECTRIC COMMUNICATION TECHNIQUE