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last 30 patents
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Patent Grant
Acoustic sensor for rock crack detection
Patent number
10,976,456
Issue date
Apr 13, 2021
RESEARCH INSTITUTE OF PETROLEUM EXPLORATION & DEVELOPMENT, PETROCHINA COMPANY...
Tongshan Wang
G01 - MEASURING TESTING
Patents Applications
last 30 patents
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Patent Application
Acoustic sensor for rock crack detection
Publication number
20180372894
Publication date
Dec 27, 2018
Research Institute of Petroleum Exploration & Development, PetroChina Company...
Tongshan WANG
G01 - MEASURING TESTING
Information
Patent Application
PHYSICAL SIMULATION METHOD AND EXPERIMENT DEVICE OF FRACTURE-CAVITY...
Publication number
20160363691
Publication date
Dec 15, 2016
Petrochina Company Limited
Suyun Hu
G01 - MEASURING TESTING