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Patents Grants
last 30 patents
Information
Patent Grant
Aerial optical fiber cable inspection method, aerial optical fiber...
Patent number
12,031,858
Issue date
Jul 9, 2024
Nippon Telegraph and Telephone Corporation
Tatsuya Okamoto
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Distributed vibration measuring device and method
Patent number
11,994,376
Issue date
May 28, 2024
Nippon Telegraph and Telephone Corporation
Tatsuya Okamoto
G01 - MEASURING TESTING
Information
Patent Grant
Optical-fiber path searching method, optical-fiber path searching s...
Patent number
11,976,962
Issue date
May 7, 2024
Nippon Telegraph and Telephone Corporation
Yoshifumi Wakisaka
G01 - MEASURING TESTING
Information
Patent Grant
Brillouin optical sensing device and optical sensing method
Patent number
11,965,758
Issue date
Apr 23, 2024
Nippon Telegraph and Telephone Corporation
Atsushi Nakamura
G01 - MEASURING TESTING
Information
Patent Grant
Vibration distribution measuring system, vibration waveform analysi...
Patent number
11,920,974
Issue date
Mar 5, 2024
Nippon Telegraph and Telephone Corporation
Tatsuya Okamoto
G01 - MEASURING TESTING
Information
Patent Grant
Test method and test device for mode field diameter
Patent number
11,906,387
Issue date
Feb 20, 2024
Nippon Telegraph and Telephone Corporation
Atsushi Nakamura
G01 - MEASURING TESTING
Information
Patent Grant
Optical fiber evaluation method and optical fiber evaluation apparatus
Patent number
11,879,803
Issue date
Jan 23, 2024
Nippon Telegraph and Telephone Corporation
Tomokazu Oda
G01 - MEASURING TESTING
Information
Patent Grant
Phase measurement method and signal processing device
Patent number
11,867,555
Issue date
Jan 9, 2024
Nippon Telegraph and Telephone Corporation
Yoshifumi Wakisaka
G01 - MEASURING TESTING
Information
Patent Grant
Vibration detection method with improved signal processing
Patent number
11,860,028
Issue date
Jan 2, 2024
Nippon Telegraph and Telephone Corporation
Yoshifumi Wakisaka
G01 - MEASURING TESTING
Information
Patent Grant
Light intensity distribution measurement method and light intensity...
Patent number
11,788,928
Issue date
Oct 17, 2023
Nippon Telegraph and Telephone Corporation
Tomokazu Oda
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Measuring device and measuring method using tape core wire
Patent number
11,788,909
Issue date
Oct 17, 2023
Nippon Telegraph and Telephone Corporation
Atsushi Nakamura
G01 - MEASURING TESTING
Information
Patent Grant
Optical pulse testing device and optical pulse testing method
Patent number
11,754,465
Issue date
Sep 12, 2023
Nippon Telegraph and Telephone Corporation
Atsushi Nakamura
G01 - MEASURING TESTING
Information
Patent Grant
Optical fiber route search method, optical fiber route search devic...
Patent number
11,750,283
Issue date
Sep 5, 2023
Nippon Telegraph and Telephone Corporation
Daisuke Iida
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Optical fiber test method and optical fiber test device
Patent number
11,719,599
Issue date
Aug 8, 2023
Nippon Telegraph and Telephone Corporation
Atsushi Nakamura
G01 - MEASURING TESTING
Information
Patent Grant
Manhole position specification method and manhole position specific...
Patent number
11,644,347
Issue date
May 9, 2023
Nippon Telegraph and Telephone Corporation
Tatsuya Okamoto
E02 - HYDRAULIC ENGINEERING FOUNDATIONS SOIL SHIFTING
Information
Patent Grant
Phase measurement method, signal processing device, and program
Patent number
11,522,606
Issue date
Dec 6, 2022
Nippon Telegraph and Telephone Corporation
Yoshifumi Wakisaka
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Device for measuring optical frequency reflection and measurement m...
Patent number
11,463,163
Issue date
Oct 4, 2022
Nippon Telegraph and Telephone Corporation
Tatsuya Okamoto
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Distributed optical fiber vibration measurement device and distribu...
Patent number
11,280,668
Issue date
Mar 22, 2022
Nippon Telegraph and Telephone Corporation
Kunihiro Toge
G02 - OPTICS
Information
Patent Grant
Electrode for power storage device, power storage device, and metho...
Patent number
9,972,446
Issue date
May 15, 2018
Meidensha Corporation
Kazuki Okuno
H01 - BASIC ELECTRIC ELEMENTS
Information
Patent Grant
Electrode for electric storage device, electric storage device and...
Patent number
9,048,025
Issue date
Jun 2, 2015
Sumitomo Electric Industries, Ltd.
Kazuki Okuno
B82 - NANO-TECHNOLOGY
Patents Applications
last 30 patents
Information
Patent Application
SIGNAL PROCESSING METHOD AND SIGNAL PROCESSING DEVICE
Publication number
20240295433
Publication date
Sep 5, 2024
Nippon Telegraph and Telephone Corporation
Yoshifumi WAKISAKA
G01 - MEASURING TESTING
Information
Patent Application
VIBRATION MEASURING INSTRUMENT AND VIBRATION MEASUREMENT METHOD
Publication number
20240280403
Publication date
Aug 22, 2024
Nippon Telegraph and Telephone Corporation
Yoshifumi WAKISAKA
G01 - MEASURING TESTING
Information
Patent Application
SENSING SYSTEM, SENSING METHOD, AND ANALYZER
Publication number
20240271971
Publication date
Aug 15, 2024
Nippon Telegraph and Telephone Corporation
Tatsuya OKAMOTO
G01 - MEASURING TESTING
Information
Patent Application
CABLE TEST SYSTEM, ANALYZER, CABLE TEST METHOD, AND PROGRAM
Publication number
20240192049
Publication date
Jun 13, 2024
Nippon Telegraph and Telephone Corporation
Tatsuya OKAMOTO
G01 - MEASURING TESTING
Information
Patent Application
ANALYZER, MEASUREMENT SYSTEM, MEASUREMENT METHOD AND PROGRAM
Publication number
20240175726
Publication date
May 30, 2024
Nippon Telegraph and Telephone Corporation
Tatsuya OKAMOTO
G01 - MEASURING TESTING
Information
Patent Application
BRILLOUIN GAIN SPECTRUM DISTRIBUTION MEASUREMENT METHOD AND EQUIPMENT
Publication number
20240146413
Publication date
May 2, 2024
Nippon Telegraph and Telephone Corporation
Tomokazu ODA
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Application
POSITIONING METHOD OF ELECTRIC POLE AND ESTIMATING METHOD OF THE ST...
Publication number
20240118126
Publication date
Apr 11, 2024
Nippon Telegraph and Telephone Corporation
Tatsuya OKAMOTO
G01 - MEASURING TESTING
Information
Patent Application
COHERENT OPTICAL MEASURING DEVICE, OPTICAL LINE TEST SYSTEM AND METHOD
Publication number
20240118127
Publication date
Apr 11, 2024
Nippon Telegraph and Telephone Corporation
Daisuke IIDA
G01 - MEASURING TESTING
Information
Patent Application
EQUIPMENT LOCATION IDENTIFICATION SYSTEM, COVER, AND EQUIPMENT LOCA...
Publication number
20240060817
Publication date
Feb 22, 2024
Nippon Telegraph and Telephone Corporation
Daisuke IIDA
G01 - MEASURING TESTING
Information
Patent Application
DEVICES AND METHODS FOR MEASURING THE AMOUNT OF FREQUENCY MODULATION
Publication number
20230400379
Publication date
Dec 14, 2023
Nippon Telegraph and Telephone Corporation
Tatsuya OKAMOTO
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Application
VIBRATION DETECTION DEVICE AND VIBRATION DETECTION METHOD
Publication number
20230358599
Publication date
Nov 9, 2023
Nippon Telegraph and Telephone Corporation
Yoshifumi WAKISAKA
G01 - MEASURING TESTING
Information
Patent Application
OPTICAL FREQUENCY DOMAIN REFLECTOMETRY APPARATUS AND METHOD
Publication number
20230341245
Publication date
Oct 26, 2023
Nippon Telegraph and Telephone Corporation
Tatsuya Okamoto
G01 - MEASURING TESTING
Information
Patent Application
OPTICAL FIBER MEASUREMENT SYSTEM, OPTICAL FIBER MEASUREMENT METHOD,...
Publication number
20230332980
Publication date
Oct 19, 2023
Nippon Telegraph and Telephone Corporation
Tomokazu ODA
G01 - MEASURING TESTING
Information
Patent Application
POWER COUPLING COEFFICIENT MEASURING METHOD AND POWER COUPLING COEF...
Publication number
20230288287
Publication date
Sep 14, 2023
Nippon Telegraph and Telephone Corporation
Atsushi NAKAMURA
G01 - MEASURING TESTING
Information
Patent Application
SEVERAL MODE FIBER TEST METHOD AND SEVERAL MODE FIBER TEST DEVICE
Publication number
20230288289
Publication date
Sep 14, 2023
Nippon Telegraph and Telephone Corporation
Atsushi NAKAMURA
G01 - MEASURING TESTING
Information
Patent Application
ELECTRIC FIELD DISTRIBUTION FLUCTUATION PERIOD MEASURING METHOD AND...
Publication number
20230288466
Publication date
Sep 14, 2023
Nippon Telegraph and Telephone Corporation
Tomokazu ODA
G01 - MEASURING TESTING
Information
Patent Application
STRAIN CHANGE MEASURING DEVICE AND STRAIN CHANGE MEASURING METHOD
Publication number
20230288191
Publication date
Sep 14, 2023
Nippon Telegraph and Telephone Corporation
Yoshifumi WAKISAKA
G01 - MEASURING TESTING
Information
Patent Application
DISTRIBUTED ACOUSTIC SENSING DEVICE AND METHOD
Publication number
20230288231
Publication date
Sep 14, 2023
Nippon Telegraph and Telephone Corporation
Tatsuya Okamoto
G01 - MEASURING TESTING
Information
Patent Application
BRILLOUIN OPTICAL SENSING DEVICE AND OPTICAL SENSING METHOD
Publication number
20230236044
Publication date
Jul 27, 2023
Nippon Telegraph and Telephone Corporation
Atsushi NAKAMURA
G01 - MEASURING TESTING
Information
Patent Application
OPTICAL PULSE TEST METHOD AND OPTICAL PULSE TEST EQUIPMENT
Publication number
20230175884
Publication date
Jun 8, 2023
Nippon Telegraph and Telephone Corporation
Yoshifumi WAKISAKA
G01 - MEASURING TESTING
Information
Patent Application
MEASURING DEVICE AND MEASURING METHOD USING TAPE CORE WIRE
Publication number
20230152170
Publication date
May 18, 2023
Nippon Telegraph and Telephone Corporation
Atsushi NAKAMURA
G01 - MEASURING TESTING
Information
Patent Application
OPTICAL FIBER EVALUATION METHOD AND OPTICAL FIBER EVALUATION APPARATUS
Publication number
20230144218
Publication date
May 11, 2023
Nippon Telegraph and Telephone Corporation
Tomokazu ODA
G01 - MEASURING TESTING
Information
Patent Application
OPTICAL FIBER TEST METHOD AND OPTICAL FIBER TEST DEVICE
Publication number
20220381645
Publication date
Dec 1, 2022
Nippon Telegraph and Telephone Corporation
Atsushi NAKAMURA
G01 - MEASURING TESTING
Information
Patent Application
FIBER OPTIC CABLE SENSING DEVICE, FIBER OPTIC CABLE SENSING METHOD,...
Publication number
20220364846
Publication date
Nov 17, 2022
Nippon Telegraph and Telephone Corporation
Daisuke IIDA
G01 - MEASURING TESTING
Information
Patent Application
Distributed Vibration Measuring Device and Method
Publication number
20220326005
Publication date
Oct 13, 2022
Nippon Telegraph and Telephone Corporation
Tatsuya Okamoto
G01 - MEASURING TESTING
Information
Patent Application
TEST METHOD AND TEST DEVICE FOR MODE FIELD DIAMETER
Publication number
20220276123
Publication date
Sep 1, 2022
Nippon Telegraph and Telephone Corporation
Atsushi NAKAMURA
G01 - MEASURING TESTING
Information
Patent Application
LIGHT INTENSITY DISTRIBUTION MEASUREMENT METHOD AND LIGHT INTENSITY...
Publication number
20220260454
Publication date
Aug 18, 2022
Nippon Telegraph and Telephone Corporation
Tomokazu ODA
G01 - MEASURING TESTING
Information
Patent Application
PHASE MEASURING METHOD AND SIGNAL PROCESSING DEVICE
Publication number
20220221314
Publication date
Jul 14, 2022
Nippon Telegraph and Telephone Corporation
Yoshifumi WAKISAKA
G01 - MEASURING TESTING
Information
Patent Application
PHASE MEASUREMENT METHOD AND SIGNAL PROCESSING DEVICE
Publication number
20220155139
Publication date
May 19, 2022
Nippon Telegraph and Telephone Corporation
Yoshifumi WAKISAKA
G01 - MEASURING TESTING
Information
Patent Application
DEVICE FOR MEASURING OPTICAL FREQUENCY REFLECTION AND MEASUREMENT M...
Publication number
20220149934
Publication date
May 12, 2022
Nippon Telegraph and Telephone Corporation
Tatsuya OKAMOTO
H04 - ELECTRIC COMMUNICATION TECHNIQUE