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Hirotaka UJIKAWA
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Yokosuka-shi, JP
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Patents Grants
last 30 patents
Information
Patent Grant
Optical communication system, master station, and optical communica...
Patent number
12,009,844
Issue date
Jun 11, 2024
Nippon Telegraph and Telephone Corporation
Rintaro Harada
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Optical communication system and master station
Patent number
11,973,531
Issue date
Apr 30, 2024
Nippon Telegraph and Telephone Corporation
Rintaro Harada
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Signal transfer system, signal transfer device, route control devic...
Patent number
11,924,740
Issue date
Mar 5, 2024
Nippon Telegraph and Telephone Corporation
Naotaka Shibata
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Communication system, communication apparatus and bandwidth allocat...
Patent number
11,909,651
Issue date
Feb 20, 2024
Nippon Telegraph and Telephone Corporation
Yumiko Senoo
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Wavelength multiplexing communication system and wavelength multipl...
Patent number
11,888,581
Issue date
Jan 30, 2024
Nippon Telegraph and Telephone Corporation
Rintaro Harada
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Bandwidth allocation apparatus, bandwidth allocation method, and ba...
Patent number
11,849,432
Issue date
Dec 19, 2023
Nippon Telegraph and Telephone Corporation
Hiroyuki Uzawa
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Optical communication system, optical communication apparatus and o...
Patent number
11,811,448
Issue date
Nov 7, 2023
Nippon Telegraph and Telephone Corporation
Hirotaka Ujikawa
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Optical communication system and master station
Patent number
11,736,186
Issue date
Aug 22, 2023
Nippon Telegraph and Telephone Corporation
Rintaro Harada
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Transfer apparatus, transfer method, and transfer program
Patent number
11,496,406
Issue date
Nov 8, 2022
Nippon Telegraph and Telephone Corporation
Rintaro Harada
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Communication processing device, information processing device, and...
Patent number
11,360,758
Issue date
Jun 14, 2022
Nippon Telegraph and Telephone Corporation
Takumi Harada
G06 - COMPUTING CALCULATING COUNTING
Information
Patent Grant
Virtual subscriber line terminal station device and control method...
Patent number
10,958,349
Issue date
Mar 23, 2021
Nippon Telegraph and Telephone Corporation
Hirotaka Ujikawa
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Patents Applications
last 30 patents
Information
Patent Application
OPTICAL COMMUNICATION MONITORING DEVICE
Publication number
20240014897
Publication date
Jan 11, 2024
Nippon Telegraph and Telephone Corporation
Sei KOU
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Application
COMMUNICATION CONTROL DEVICE, COMMUNICATION CONTROL SYSTEM, COMMUNI...
Publication number
20230421934
Publication date
Dec 28, 2023
Nippon Telegraph and Telephone Corporation
Takamitsu TOCHINO
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Application
AUTOMATIC CONNECTION CONTROLLER, AUTOMATIC CONNECTION CONTROL METHO...
Publication number
20230421506
Publication date
Dec 28, 2023
Nippon Telegraph and Telephone Corporation
Takamitsu TOCHINO
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Application
OPTICAL COMMUNICATION SYSTEM, MONITORING DEVICE, AND MONITORING METHOD
Publication number
20230362520
Publication date
Nov 9, 2023
Nippon Telegraph and Telephone Corporation
Hirotaka UJIKAWA
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Application
OPTICAL COMMUNICATION MONITORING DEVICE
Publication number
20230327757
Publication date
Oct 12, 2023
Nippon Telegraph and Telephone Corporation
Sei KOU
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Application
COMMUNICATION MONITORING APPARATUS AND COMMUNICATION MONITORING SYSTEM
Publication number
20230327756
Publication date
Oct 12, 2023
Nippon Telegraph and Telephone Corporation
Tomoya HATANO
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Application
COMMUNICATION MONITORING SYSTEM
Publication number
20230327755
Publication date
Oct 12, 2023
Nippon Telegraph and Telephone Corporation
Yuka OKAMOTO
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Application
COMMUNICATION DEVICE, COMMUNICATION METHOD, COMMUNICATION SYSTEM AN...
Publication number
20230318730
Publication date
Oct 5, 2023
Nippon Telegraph and Telephone Corporation
Takamitsu TOCHINO
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Application
OPTICAL COMMUNICATION SYSTEM, MONITORING DEVICE, AND MONITORING METHOD
Publication number
20230318704
Publication date
Oct 5, 2023
Nippon Telegraph and Telephone Corporation
Hirotaka UJIKAWA
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Application
COMMUNICATION DEVICE, COMMUNICATION METHOD, COMMUNICATION SYSTEM AN...
Publication number
20230275682
Publication date
Aug 31, 2023
Nippon Telegraph and Telephone Corporation
Takamitsu TOCHINO
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Application
COMMUNICATION DEVICE, COMMUNICATION METHOD, COMMUNICATION SYSTEM AN...
Publication number
20230261744
Publication date
Aug 17, 2023
Nippon Telegraph and Telephone Corporation
Takamitsu TOCHINO
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Application
OPTICAL COMMUNICATION MONITORING DEVICE
Publication number
20230247335
Publication date
Aug 3, 2023
Nippon Telegraph and Telephone Corporation
Sei KOU
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Application
OPTICAL COMMUNICATION SYSTEM AND MASTER STATION
Publication number
20230198613
Publication date
Jun 22, 2023
Nippon Telegraph and Telephone Corporation
Rintaro Harada
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Application
COMMUNICATION CONTROL DEVICE, COMMUNICATION METHOD, COMMUNICATION S...
Publication number
20230188240
Publication date
Jun 15, 2023
Nippon Telegraph and Telephone Corporation
Takamitsu TOCHINO
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Application
OPTICAL COMMUNICATION SYSTEM, MASTER STATION, AND OPTICAL COMMUNICA...
Publication number
20230170990
Publication date
Jun 1, 2023
Nippon Telegraph and Telephone Corporation
Rintaro Harada
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Application
WAVELENGTH MULTIPLEXING COMMUNICATION SYSTEM AND WAVELENGTH MULTIPL...
Publication number
20230155712
Publication date
May 18, 2023
Nippon Telegraph and Telephone Corporation
Rintaro Harada
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Application
OPTICAL COMMUNICATION SYSTEM AND MASTER STATION
Publication number
20230155674
Publication date
May 18, 2023
Nippon Telegraph and Telephone Corporation
Rintaro Harada
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Application
OPTICAL COMMUNICATION SYSTEM AND MASTER STATION
Publication number
20230142562
Publication date
May 11, 2023
Nippon Telegraph and Telephone Corporation
Hirotaka UJIKAWA
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Application
MONITORING DEVICE, COMMUNICATION SYSTEM, COMMUNICATION CONTROL METH...
Publication number
20230145000
Publication date
May 11, 2023
Nippon Telegraph and Telephone Corporation
Naotaka SHIBATA
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Application
BASE STATION, WIRELESS COMMUNICATION SYSTEM, AND WIRELESS COMMUNICA...
Publication number
20230137775
Publication date
May 4, 2023
Nippon Telegraph and Telephone Corporation
Naotaka SHIBATA
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Application
OPTICAL TRANSMISSION DEVICE, OPTICAL COMMUNICATION SYSTEM, AND OPTI...
Publication number
20230140715
Publication date
May 4, 2023
Nippon Telegraph and Telephone Corporation
Naotaka SHIBATA
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Application
MONITORING DEVICE, COMMUNICATION SYSTEM, COMMUNICATION CONTROL METH...
Publication number
20230120832
Publication date
Apr 20, 2023
Nippon Telegraph and Telephone Corporation
Naotaka SHIBATA
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Application
WAVELENGTH MULTIPLEXING COMMUNICATION SYSTEM AND WAVELENGTH MULTIPL...
Publication number
20230094895
Publication date
Mar 30, 2023
Nippon Telegraph and Telephone Corporation
Rintaro Harada
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Application
OPTICAL COMMUNICATION SYSTEM, OPTICAL COMMUNICATION APPARATUS AND O...
Publication number
20230088621
Publication date
Mar 23, 2023
Nippon Telegraph and Telephone Corporation
Hirotaka UJIKAWA
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Application
BANDWIDTH ALLOCATION APPARATUS, BANDWIDTH ALLOCATION METHOD, AND BA...
Publication number
20220417914
Publication date
Dec 29, 2022
Nippon Telegraph and Telephone Corporation
Hiroyuki UZAWA
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Application
SIGNAL TRANSFER SYSTEM, SIGNAL TRANSFER DEVICE, ROUTE CONTROL DEVIC...
Publication number
20220210718
Publication date
Jun 30, 2022
Nippon Telegraph and Telephone Corporation
Naotaka SHIBATA
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Application
COMMUNICATION SYSTEM, SUBSCRIBER LINE TERMINAL APPARATUS AND COMMUN...
Publication number
20220150042
Publication date
May 12, 2022
Nippon Telegraph and Telephone Corporation
Takahiro SUZUKI
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Application
COMMUNICATION SYSTEM, COMMUNICATION APPARATUS AND BANDWIDTH ALLOCAT...
Publication number
20220021617
Publication date
Jan 20, 2022
Nippon Telegraph and Telephone Corporation
Yumiko SENOO
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Application
TRANSFER APPARATUS, TRANSFER METHOD, AND TRANSFER PROGRAM
Publication number
20210112016
Publication date
Apr 15, 2021
Nippon Telegraph and Telephone Corporation
Rintaro HARADA
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Application
VIRTUAL SUBSCRIBER LINE TERMINAL STATION DEVICE AND CONTROL METHOD...
Publication number
20200177280
Publication date
Jun 4, 2020
Nippon Telegraph and Telephone Corporation
Hirotaka UJIKAWA
H04 - ELECTRIC COMMUNICATION TECHNIQUE