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Yokosuka-shi, JP
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Patents Grants
last 30 patents
Information
Patent Grant
Adaptive equalization filter and method for updating filter coeffic...
Patent number
12,224,889
Issue date
Feb 11, 2025
Nippon Telegraph and Telephone Corporation
Etsushi Yamazaki
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
Optical transmission system and compensation method
Patent number
11,711,151
Issue date
Jul 25, 2023
Nippon Telegraph and Telephone Corporation
Asuka Matsushita
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Wavelength dispersion compensation apparatus, optical receiving app...
Patent number
11,683,093
Issue date
Jun 20, 2023
Nippon Telegraph and Telephone Corporation
Masanori Nakamura
H03 - BASIC ELECTRONIC CIRCUITRY
Information
Patent Grant
Optical transmission system and output adjustment apparatus
Patent number
11,575,443
Issue date
Feb 7, 2023
Nippon Telegraph and Telephone Corporation
Takashi Mitsui
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Wavelength dispersion amount estimation apparatus
Patent number
11,463,169
Issue date
Oct 4, 2022
Nippon Telegraph and Telephone Corporation
Kengo Horikoshi
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Optical transmission system, optical receiving apparatus and optica...
Patent number
11,444,699
Issue date
Sep 13, 2022
Nippon Telegraph and Telephone Corporation
Akira Masuda
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Semiconductor integrated optics element and production method therefor
Patent number
11,367,997
Issue date
Jun 21, 2022
Nippon Telegraph and Telephone Corporation
Takahiko Shindo
H01 - BASIC ELECTRIC ELEMENTS
Information
Patent Grant
Receiving apparatus and receiving method
Patent number
11,258,512
Issue date
Feb 22, 2022
Nippon Telegraph and Telephone Corporation
Seiji Okamoto
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Fiber module
Patent number
11,237,334
Issue date
Feb 1, 2022
Nippon Telegraph and Telephone Corporation
Kengo Horikoshi
G02 - OPTICS
Information
Patent Grant
Signal-to-noise ratio estimation method, optical transmission appar...
Patent number
10,841,006
Issue date
Nov 17, 2020
Nippon Telegraph and Telephone Corporation
Seiji Okamoto
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Optical receiver, optical reception method, and optical communicati...
Patent number
10,826,620
Issue date
Nov 3, 2020
Nippon Telegraph and Telephone Corporation
Fukutaro Hamaoka
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Optical transmitter, optical receiver, optical data transmission sy...
Patent number
10,651,944
Issue date
May 12, 2020
Nippon Telegraph and Telephone Corporation
Kengo Horikoshi
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
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 modulator driver circuit and optical transmitter
Patent number
10,243,664
Issue date
Mar 26, 2019
Nippon Telegraph and Telephone Corporation
Munehiko Nagatani
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
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 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
Digital signal processing apparatus
Patent number
8,977,141
Issue date
Mar 10, 2015
Nippon Telegraph and Telephone Corporation
Kengo Horikoshi
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Patents Applications
last 30 patents
Information
Patent Application
GAIN ADJUSTMENT METHOD, OPTICAL RECEIVING APPARATUS AND COMPUTER PR...
Publication number
20250055573
Publication date
Feb 13, 2025
Nippon Telegraph and Telephone Corporation
Kyo MINOGUCHI
H04 - ELECTRIC COMMUNICATION TECHNIQUE
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
ADAPTIVE EQUALIZER, STEP SIZE DERIVATION METHOD AND PROGRAM
Publication number
20240007195
Publication date
Jan 4, 2024
Nippon Telegraph and Telephone Corporation
Kengo HORIKOSHI
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
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, OPTICAL RECEIVING APP...
Publication number
20220224415
Publication date
Jul 14, 2022
Nippon Telegraph and Telephone Corporation
Masanori NAKAMURA
H03 - BASIC ELECTRONIC CIRCUITRY
Information
Patent Application
OPTICAL TRANSMISSION SYSTEM AND COMPENSATION METHOD
Publication number
20220216923
Publication date
Jul 7, 2022
Nippon Telegraph and Telephone Corporation
Asuka MATSUSHITA
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Application
WAVELENGTH DISPERSION AMOUNT ESTIMATION APPARATUS
Publication number
20220158731
Publication date
May 19, 2022
Nippon Telegraph and Telephone Corporation
Kengo HORIKOSHI
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Application
OPTICAL TRANSMISSION SYSTEM AND OUTPUT ADJUSTMENT APPARATUS
Publication number
20220140906
Publication date
May 5, 2022
Nippon Telegraph and Telephone Corporation
Takashi MITSUI
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Application
OPTICAL TRANSMISSION SYSTEM, OPTICAL RECEIVING APPARATUS AND OPTICA...
Publication number
20220069921
Publication date
Mar 3, 2022
Nippon Telegraph and Telephone Corporation
Akira MASUDA
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Application
RECEIVING APPARATUS AND RECEIVING METHOD
Publication number
20210218471
Publication date
Jul 15, 2021
Nippon Telegraph and Telephone Corporation
Seiji OKAMOTO
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Application
FIBER MODULE
Publication number
20210041631
Publication date
Feb 11, 2021
Nippon Telegraph and Telephone Corporation
Kengo HORIKOSHI
G02 - OPTICS
Information
Patent Application
Semiconductor Integrated Optics Element and Production Method Therefor
Publication number
20210006032
Publication date
Jan 7, 2021
Nippon Telegraph and Telephone Corporation
Takahiko Shindo
H01 - BASIC ELECTRIC ELEMENTS
Information
Patent Application
OPTICAL RECEIVER, OPTICAL RECEPTION METHOD, AND OPTICAL COMMUNICATI...
Publication number
20200052793
Publication date
Feb 13, 2020
Nippon Telegraph and Telephone Corporation
Fukutaro HAMAOKA
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Application
SIGNAL-TO-NOISE RATIO ESTIMATION METHOD, OPTICAL TRANSMISSION APPAR...
Publication number
20200028586
Publication date
Jan 23, 2020
Nippon Telegraph and Telephone Corporation
Seiji OKAMOTO
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Application
OPTICAL TRANSMITTER, OPTICAL RECEIVER, OPTICAL DATA TRANSMISSION SY...
Publication number
20190273560
Publication date
Sep 5, 2019
Nippon Telegraph and Telephone Corporation
Kengo HORIKOSHI
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
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
Optical Modulator Driver Circuit and Optical Transmitter
Publication number
20160087727
Publication date
Mar 24, 2016
Nippon Telegraph and Telephone Corporation
Munehiko Nagatani
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Application
OPTICAL TRANSMISSION SYSTEM, PHASE COMPENSATION METHOD, AND OPTICAL...
Publication number
20150372766
Publication date
Dec 24, 2015
Nippon Telegraph and Telephone Corporation
Mitsuteru YOSHIDA
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Application
COHERENT COMMUNICATION SYSTEM, COMMUNICATION METHOD, AND TRANSMISSI...
Publication number
20150341138
Publication date
Nov 26, 2015
Nippon Telegraph and Telephone Corporation
Koichi ISHIHARA
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Application
OPTICAL RECEIVING DEVICE AND PHASE CYCLE REDUCTION METHOD
Publication number
20150333838
Publication date
Nov 19, 2015
Nippon Telegraph and Telephone Corporation
Kengo HORIKOSHI
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Application
DIGITAL SIGNAL PROCESSING APPARATUS
Publication number
20130308960
Publication date
Nov 21, 2013
Nippon Telegraph and Telephone Corporation
Kengo Horikoshi
H04 - ELECTRIC COMMUNICATION TECHNIQUE