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Kanagawa, JP
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Patents Grants
last 30 patents
Information
Patent Grant
Optical power supply system, power receiving side optical communica...
Patent number
12,368,517
Issue date
Jul 22, 2025
Nippon Telegraph and Telephone Corporation
Kenta Ito
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Communication apparatus and temperature monitoring method
Patent number
12,353,199
Issue date
Jul 8, 2025
Nippon Telegraph and Telephone Corporation
Haruka Nagoshi
H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
Information
Patent Grant
Signal converting apparatus and signal converting method
Patent number
12,355,493
Issue date
Jul 8, 2025
Nippon Telegraph and Telephone Corporation
Akihiro Tanabe
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Optical power supply system, wakeup method and optical communicatio...
Patent number
12,316,385
Issue date
May 27, 2025
Nippon Telegraph and Telephone Corporation
Hiroaki Katsurai
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Optical power reception apparatus, communication apparatus and opti...
Patent number
12,308,890
Issue date
May 20, 2025
Nippon Telegraph and Telephone Corporation
Kyo Minoguchi
H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
Information
Patent Grant
Optical power supply system, power receiving side optical communica...
Patent number
12,294,415
Issue date
May 6, 2025
Nippon Telegraph and Telephone Corporation
Kenta Ito
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Optical communication system
Patent number
12,283,990
Issue date
Apr 22, 2025
Nippon Telegraph and Telephone Corporation
Kyo Minoguchi
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Communication network terminating device, communication system, sig...
Patent number
12,267,151
Issue date
Apr 1, 2025
Nippon Telegraph and Telephone Corporation
Akihiro Tanabe
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Optical transmission system and transmission quality monitoring method
Patent number
12,224,795
Issue date
Feb 11, 2025
Nippon Telegraph and Telephone Corporation
Toshiaki Shitaba
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Optical transmission system and optical transmission method
Patent number
12,199,671
Issue date
Jan 14, 2025
Nippon Telegraph and Telephone Corporation
Kyo Minoguchi
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Optical transmission apparatus and optical transmission method
Patent number
12,155,411
Issue date
Nov 26, 2024
Nippon Telegraph and Telephone Corporation
Akihiro Tanabe
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Optical communication system, optical line termination apparatus an...
Patent number
11,949,460
Issue date
Apr 2, 2024
Nippon Telegraph and Telephone Corporation
Kyo Minoguchi
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Optical transmission apparatus and optical transmission method
Patent number
11,929,787
Issue date
Mar 12, 2024
Nippon Telegraph and Telephone Corporation
Akihiro Tanabe
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Communication apparatus and error detection method
Patent number
11,863,230
Issue date
Jan 2, 2024
Nippon Telegraph and Telephone Corporation
Kenta Ito
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Station-side device and wavelength control method
Patent number
10,361,807
Issue date
Jul 23, 2019
Nippon Telegraph and Telephone Corporation
Katsuhisa Taguchi
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Station-side device and wavelength changeover method
Patent number
10,230,485
Issue date
Mar 12, 2019
Nippon Telegraph and Telephone Corporation
Tomoaki Yoshida
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Station-side device and wavelength changeover monitoring method
Patent number
10,211,945
Issue date
Feb 19, 2019
Nippon Telegraph and Telephone Corporation
Tomoaki Yoshida
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Station-side device and communication method
Patent number
10,211,944
Issue date
Feb 19, 2019
Nippon Telegraph and Telephone Corporation
Tomoaki Yoshida
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Optical communication system, station-side device, subscriber devic...
Patent number
10,009,137
Issue date
Jun 26, 2018
Nippon Telegraph and Telephone Corporation
Tomoaki Yoshida
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
WDM/TDM-PON system and transmission start time correction method th...
Patent number
9,871,614
Issue date
Jan 16, 2018
Nippon Telegraph and Telephone Corporation
Tomoaki Yoshida
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Optical communication system and optical communication abnormality-...
Patent number
9,780,867
Issue date
Oct 3, 2017
Nippon Telegraph and Telephone Corporation
Tomoaki Yoshida
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Protection method and optical communication system
Patent number
9,768,908
Issue date
Sep 19, 2017
Nippon Telegraph and Telephone Corporation
Shin Kaneko
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Optical system, and dynamic wavelength bandwidth allocation method...
Patent number
9,749,079
Issue date
Aug 29, 2017
Nippon Telegraph and Telephone Corporation
Tomoaki Yoshida
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Optical system, and dynamic wavelength bandwidth allocation method...
Patent number
9,705,626
Issue date
Jul 11, 2017
Nippon Telegraph and Telephone Corporation
Tomoaki Yoshida
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Bandwidth allocation device and bandwidth allocation method
Patent number
9,236,971
Issue date
Jan 12, 2016
Nippon Telegraph and Telephone Corporation
Shinya Tamaki
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Server device for media, method for controlling server for media, a...
Patent number
8,230,101
Issue date
Jul 24, 2012
Kabushiki Kaisha Kenwood
Satoru Sekiguchi
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Automatic bit rate control circuit
Patent number
7,936,842
Issue date
May 3, 2011
Nippon Telegraph and Telephone Corporation
Shunji Kimura
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Bit rate discrimination circuit based on a low frequency component...
Patent number
7,881,414
Issue date
Feb 1, 2011
Nippon Telegraph and Telephone Corporation
Shunji Kimura
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Production method of vapor-grown carbon fiber and apparatus therefor
Patent number
7,846,415
Issue date
Dec 7, 2010
Showa Denko K.K.
Eiji Kambara
B82 - NANO-TECHNOLOGY
Information
Patent Grant
Vapor grown carbon fiber, and production method and use thereof
Patent number
7,527,779
Issue date
May 5, 2009
Showa Denko K.K.
Kotaro Yano
C08 - ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-...
Patents Applications
last 30 patents
Information
Patent Application
OPTICAL COMMUNICATION APPARATUS AND OPTICAL COMMUNICATION METHOD
Publication number
20250168537
Publication date
May 22, 2025
Nippon Telegraph and Telephone Corporation
Naotaka SHIBATA
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Application
OPTICAL TRANSCEIVER, COMMUNICATION APPARATUS AND POWER SUPPLY CONTR...
Publication number
20250150171
Publication date
May 8, 2025
Nippon Telegraph and Telephone Corporation
Hiroaki KATSURAI
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Application
COMMUNICATION APPARATUS AND COMMUNICATION CONTROL METHOD
Publication number
20250133503
Publication date
Apr 24, 2025
Nippon Telegraph and Telephone Corporation
Yoichi FUKADA
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Application
OPTICAL RECEIVING APPARATUS, OPTICAL TRANSMISSION APPARATUS, OPTICA...
Publication number
20250132837
Publication date
Apr 24, 2025
Nippon Telegraph and Telephone Corporation
Ryo MIYATAKE
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Application
OPTICAL TRANSMITTING APPARATUS, AND CONTROL METHOD
Publication number
20250125877
Publication date
Apr 17, 2025
Nippon Telegraph and Telephone Corporation
Ryo MIYATAKE
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Application
DEVICE SWITCHING METHOD AND OPTICAL COMMUNICATION SYSTEM
Publication number
20250096897
Publication date
Mar 20, 2025
Nippon Telegraph and Telephone Corporation
Kenta ITO
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Application
OPTICAL RECEIVING APPARATUS, OPTICAL RECEIVING METHOD AND OPTICAL T...
Publication number
20250080223
Publication date
Mar 6, 2025
Nippon Telegraph and Telephone Corporation
Toshiaki SHITABA
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Application
OPTICAL NODE APPARATUS, OPTICAL COMMUNICATION SYSTEM AND TRANSMISSI...
Publication number
20250016479
Publication date
Jan 9, 2025
Nippon Telegraph and Telephone Corporation
Takuya KANAI
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Application
OPTICAL TRANSMISSION DEVICE
Publication number
20250016480
Publication date
Jan 9, 2025
Nippon Telegraph and Telephone Corporation
Naotaka SHIBATA
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Application
COMMUNICATION SYSTEM AND CONTROL METHOD
Publication number
20250008439
Publication date
Jan 2, 2025
Nippon Telegraph and Telephone Corporation
Ryo MIYATAKE
H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
Information
Patent Application
OPTICAL TRANSMITTING APPARATUS, OPTICAL TRANSMITTING METHOD AND OPT...
Publication number
20240421910
Publication date
Dec 19, 2024
Nippon Telegraph and Telephone Corporation
Toshiaki SHITABA
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Application
OPTICAL COMMUNICATION DEVICE AND SLEEP CONTROL METHOD
Publication number
20240380496
Publication date
Nov 14, 2024
Nippon Telegraph and Telephone Corporation
Ryo MIYATAKE
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Application
SIGNAL AMPLIFICATION METHOD AND OPTICAL RECEIVING APPARATUS
Publication number
20240356654
Publication date
Oct 24, 2024
Nippon Telegraph and Telephone Corporation
Toshiaki SHITABA
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Application
COMMUNICATION SYSTEM, COMMUNICATION APPARATUS, AND COMMUNICATION ME...
Publication number
20240275497
Publication date
Aug 15, 2024
Nippon Telegraph and Telephone Corporation
Haruka NAGOSHI
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Application
LIGHT FEEDING APPARATUS AND LIGHT FEEDING METHOD
Publication number
20240275496
Publication date
Aug 15, 2024
Nippon Telegraph and Telephone Corporation
Hiroaki KATSURAI
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Application
OPTICAL TRANSMITTING APPARATUS AND OPTICAL TRANSMITTING METHOD
Publication number
20240162991
Publication date
May 16, 2024
Nippon Telegraph and Telephone Corporation
Ryo MIYATAKE
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Application
OPTICAL TRANSMITTING APPARATUS AND SIGNAL DETECTION METHOD
Publication number
20240056193
Publication date
Feb 15, 2024
Nippon Telegraph and Telephone Corporation
Akihiro TANABE
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Application
OPTICAL POWER SUPPLY SYSTEM, OPTICAL POWER SUPPLY METHOD AND POWER...
Publication number
20240056198
Publication date
Feb 15, 2024
Nippon Telegraph and Telephone Corporation
Ryo Miyatake
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Application
OPTICAL POWER SUPPLY SYSTEM, OPTICAL POWER SUPPLY METHOD AND POWER...
Publication number
20240039642
Publication date
Feb 1, 2024
Nippon Telegraph and Telephone Corporation
Ryo Miyatake
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Application
OPTICAL POWER SUPPLY SYSTEM, SLEEP CONTROL METHOD AND POWER RECEIVI...
Publication number
20240031037
Publication date
Jan 25, 2024
Nippon Telegraph and Telephone Corporation
Ryo Miyatake
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Application
OPTICAL POWER SUPPLY SYSTEM, POWER RECEIVING SIDE OPTICAL COMMUNICA...
Publication number
20240022336
Publication date
Jan 18, 2024
Nippon Telegraph and Telephone Corporation
Kenta ITO
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Application
HOST DEVICE, OPTICAL ACCESS SYSTEM, TRANSFER METHOD AND COMPUTER PR...
Publication number
20240022503
Publication date
Jan 18, 2024
Nippon Telegraph and Telephone Corporation
Satoshi SHIMAZU
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Application
MIGRATION SUBSCRIBER LINE TERMINAL, TRANSFER METHOD AND OPTICAL ACC...
Publication number
20240015423
Publication date
Jan 11, 2024
Nippon Telegraph and Telephone Corporation
Satoshi SHIMAZU
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Application
OPTICAL COMMUNICATION SYSTEM, CONTROL METHOD AND OPTICAL SUBSCRIBER...
Publication number
20240007776
Publication date
Jan 4, 2024
Nippon Telegraph and Telephone Corporation
Haruka NAGOSHI
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Application
OPTICAL POWER SUPPLY SYSTEM, POWER RECEIVING SIDE OPTICAL COMMUNICA...
Publication number
20230421269
Publication date
Dec 28, 2023
Nippon Telegraph and Telephone Corporation
Kenta ITO
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Application
MIGRATION ASSIST DEVICE, MIGRATION METHOD AND OPTICAL ACCESS SYSTEM
Publication number
20230412272
Publication date
Dec 21, 2023
Nippon Telegraph and Telephone Corporation
Satoshi SHIMAZU
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Application
OPTICAL POWER SUPPLY SYSTEM, WAKEUP METHOD AND OPTICAL COMMUNICATIO...
Publication number
20230403081
Publication date
Dec 14, 2023
Nippon Telegraph and Telephone Corporation
Hiroaki KATSURAI
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Application
SIGNAL CONVERTING APPARATUS AND SIGNAL CONVERTING METHOD
Publication number
20230370167
Publication date
Nov 16, 2023
Nippon Telegraph and Telephone Corporation
Akihiro TANABE
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Application
OPTICAL TRANSMITTING APPARATUS, OPTICAL TRANSMITTING METHOD AND OPT...
Publication number
20230353249
Publication date
Nov 2, 2023
Nippon Telegraph and Telephone Corporation
Toshiaki SHITABA
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Application
OPTICAL POWER RECEPTION APPARATUS, COMMUNICATION APPARATUS AND OPTI...
Publication number
20230344525
Publication date
Oct 26, 2023
Nippon Telegraph and Telephone Corporation
Kyo MINOGUCHI
H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER