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Tomoyoshi KATAOKA
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Yokosuka-shi, JP
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Patents Grants
last 30 patents
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
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
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
Light modulation device and light modulation method
Patent number
10,090,921
Issue date
Oct 2, 2018
Nippon Telegraph and Telephone Corporation
Mikio Yoneyama
G02 - OPTICS
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
Wavelength selection switch system and method for controlling wavel...
Patent number
9,294,826
Issue date
Mar 22, 2016
Nippon Telegraph and Telephone Corporation
Tomoyoshi Kataoka
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Wavelength selection switch system and method for controlling wavel...
Patent number
9,247,324
Issue date
Jan 26, 2016
Nippon Telegraph and Telephone Corporation
Tomoyoshi Kataoka
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Optical transmission system, optical transmitter for optical transm...
Patent number
8,005,374
Issue date
Aug 23, 2011
Nippon Telegraph and Telephone Corporation
Kazushige Yonenaga
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Optical transmission system, optical transmitter for optical transm...
Patent number
7,734,194
Issue date
Jun 8, 2010
Nippon Telegraph and Telephone Corporation
Kazushige Yonenaga
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Optical transmission circuit
Patent number
6,983,085
Issue date
Jan 3, 2006
Nippon Telegraph and Telephone Corporation
Tomoyoshi Kataoka
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Patents Applications
last 30 patents
Information
Patent Application
LIGHT MODULATION DEVICE AND LIGHT MODULATION METHOD
Publication number
20170117961
Publication date
Apr 27, 2017
Nippon Telegraph and Telephone Corporation
Mikio YONEYAMA
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Application
TRANSPORT APPARATUS AND TRANSPORT METHOD
Publication number
20170111116
Publication date
Apr 20, 2017
Nippon Telegraph and Telephone Corporation
Takuya OHARA
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Application
OPTICAL SIGNAL TRANSMISSION APPARATUS AND OPTICAL SIGNAL TRANSMISSI...
Publication number
20170070296
Publication date
Mar 9, 2017
Nippon Telegraph and Telephone Corporation
Seiji OKAMOTO
H04 - ELECTRIC COMMUNICATION TECHNIQUE
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
WAVELENGTH SELECTION SWITCH SYSTEM AND METHOD FOR CONTROLLING WAVEL...
Publication number
20150030327
Publication date
Jan 29, 2015
Nippon Telegraph and Telephone Corporation
Tomoyoshi Kataoka
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Application
Optical Transmission System, Optical Transmitter for Optical Transm...
Publication number
20100172653
Publication date
Jul 8, 2010
Nippon Telegraph and Telephone Corporation
Kazushige Yonenaga
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Application
Multiplexing relay transmission device
Publication number
20040114638
Publication date
Jun 17, 2004
Akihiko Matsuura
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Application
Optical transmission circuit
Publication number
20030147577
Publication date
Aug 7, 2003
Tomoyoshi Kataoka
H04 - ELECTRIC COMMUNICATION TECHNIQUE