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last 30 patents
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Patent Grant
Data transmission system and method for transmission of downhole me...
Patent number
9,739,141
Issue date
Aug 22, 2017
China Petroleum and Chemical Corporation
Yijin Zeng
E21 - EARTH DRILLING MINING
Patents Applications
last 30 patents
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Patent Application
Data Transmission System and Method for Transmission of Downhole Me...
Publication number
20160115783
Publication date
Apr 28, 2016
CHINA PETROLEUM & CHEMICAL CORPORATION
Yijin Zeng
E21 - EARTH DRILLING MINING