Qingzhou Yao

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Beijing, CN

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Patents Grantslast 30 patents

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
Information Patent Grant
Method and device of identifying fracture
- Patent number 10,845,495
- Issue date Nov 24, 2020
- PetroChina Company Limited
- Chao Feng
- G01 - MEASURING TESTING

Patents Applicationslast 30 patents

Information 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 Device Of Identifying Fracture
- Publication number 20190041535
- Publication date Feb 7, 2019
- Chao Feng
- E21 - EARTH DRILLING MINING