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Patents Grants
last 30 patents
Information
Patent Grant
Method and apparatus for identifying low permeable conglomerate dia...
Patent number
11,175,422
Issue date
Nov 16, 2021
PetroChina Company Limited
Yongqiang Qu
E21 - EARTH DRILLING MINING
Information
Patent Grant
Method, apparatus, and system for eliminating frequency dispersion...
Patent number
10,921,477
Issue date
Feb 16, 2021
PetroChina Company Limited
Chuang Li
G01 - MEASURING TESTING
Patents Applications
last 30 patents
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Patent Application
METHOD, APPARATUS, AND SYSTEM FOR ELIMINATING FREQUENCY DISPERSION...
Publication number
20190293822
Publication date
Sep 26, 2019
Petrochina Company Limited
Chuang LI
G01 - MEASURING TESTING
Information
Patent Application
METHOD AND APPARATUS FOR IDENTIFYING LOW PERMEABLE CONGLOMERATE DIA...
Publication number
20190011584
Publication date
Jan 10, 2019
Petrochina Company Limited
Yongqiang QU
G01 - MEASURING TESTING