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Ryuta SUGIYAMA
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Tokyo, JP
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Patents Grants
last 30 patents
Information
Patent Grant
Time synchronization system, management device, time synchronizatio...
Patent number
11,927,923
Issue date
Mar 12, 2024
Nippon Telegraph and Telephone Corporation
Takaaki Hisashima
G01 - MEASURING TESTING
Information
Patent Grant
Transceiver, spatial light frequency transmission system and spatia...
Patent number
11,881,900
Issue date
Jan 23, 2024
Nippon Telegraph and Telephone Corporation
Hiroki Sakuma
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Clock frequency monitoring device and clock frequency monitoring me...
Patent number
11,815,552
Issue date
Nov 14, 2023
Nippon Telegraph and Telephone Corporation
Takaaki Hisashima
G06 - COMPUTING CALCULATING COUNTING
Information
Patent Grant
Time comparison system, time comparison device, and time comparison...
Patent number
11,695,473
Issue date
Jul 4, 2023
Nippon Telegraph and Telephone Corporation
Hiroki Sakuma
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Time path selection device and time path selection method
Patent number
11,240,141
Issue date
Feb 1, 2022
Nippon Telegraph and Telephone Corporation
Ryuta Sugiyama
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Time synchronization system and time synchronization method
Patent number
11,196,535
Issue date
Dec 7, 2021
Nippon Telegraph and Telephone Corporation
Hiroki Sakuma
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Time synchronization device and time synchronization method
Patent number
11,196,499
Issue date
Dec 7, 2021
Nippon Telegraph and Telephone Corporation
Kaoru Arai
G04 - HOROLOGY
Information
Patent Grant
Time synchronization system and time synchronization method
Patent number
11,196,533
Issue date
Dec 7, 2021
Nippon Telegraph and Telephone Corporation
Hiroki Sakuma
G06 - COMPUTING CALCULATING COUNTING
Patents Applications
last 30 patents
Information
Patent Application
OPTICAL COMPLEX AMPLITUDE MEASUREMENT DEVICE AND OPTICAL COMPLEX AM...
Publication number
20230288182
Publication date
Sep 14, 2023
Nippon Telegraph and Telephone Corporation
Hiroki SAKUMA
G01 - MEASURING TESTING
Information
Patent Application
MESSAGE PROCESSING SERVER, PROGRAM AND MESSAGE PROCESSING METHOD
Publication number
20230267541
Publication date
Aug 24, 2023
Nippon Telegraph and Telephone Corporation
Kaoru ARAI
G06 - COMPUTING CALCULATING COUNTING
Information
Patent Application
TRANSCEIVER, SPATIAL LIGHT FREQUENCY TRANSMISSION SYSTEM AND SPATIA...
Publication number
20220407607
Publication date
Dec 22, 2022
Nippon Telegraph and Telephone Corporation
Hiroki SAKUMA
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Application
RECEIVER, TRANSCEIVER, SPATIAL OPTICAL FREQUENCY TRANSMISSION SYST...
Publication number
20220376783
Publication date
Nov 24, 2022
Nippon Telegraph and Telephone Corporation
Hiroki SAKUMA
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Application
TIME COMPARISON SYSTEM, TIME COMPARISON DEVICE, AND TIME COMPARISON...
Publication number
20220021448
Publication date
Jan 20, 2022
Nippon Telegraph and Telephone Corporation
Hiroki SAKUMA
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Application
TIME SYNCHRONIZATION SYSTEM AND TIME SYNCHRONIZATION METHOD
Publication number
20210314134
Publication date
Oct 7, 2021
Nippon Telegraph and Telephone Corporation
Hiroki SAKUMA
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Application
CLOCK FREQUENCY MONITORING DEVICE AND CLOCK FREQUENCY MONITORING ME...
Publication number
20210302499
Publication date
Sep 30, 2021
Takaaki HISASHIMA
G06 - COMPUTING CALCULATING COUNTING
Information
Patent Application
TIME SYNCHRONIZATION SYSTEM, MANAGEMENT DEVICE, TIME SYNCHRONIZATIO...
Publication number
20210072707
Publication date
Mar 11, 2021
Nippon Telegraph and Telephone Corporation
Takaaki Hisashima
G01 - MEASURING TESTING
Information
Patent Application
TIME SYNCHRONIZATION SYSTEM AND TIME SYNCHRONIZATION METHOD
Publication number
20210058223
Publication date
Feb 25, 2021
Nippon Telegraph and Telephone Corporation
Hiroki SAKUMA
G06 - COMPUTING CALCULATING COUNTING
Information
Patent Application
TIME SYNCHRONIZATION DEVICE AND TIME SYNCHRONIZATION METHOD
Publication number
20210021362
Publication date
Jan 21, 2021
Nippon Telegraph and Telephone Corporation
Kaoru ARAI
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Application
Time Path Selection Device and Time Path Selection Method
Publication number
20200403901
Publication date
Dec 24, 2020
Nippon Telegraph and Telephone Corporation
Ryuta SUGIYAMA
H04 - ELECTRIC COMMUNICATION TECHNIQUE