Zhikun Liu

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Hebei, CN

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Patents Grantslast 30 patents

Information Patent Grant
Logging encapsulated optical-fiber duct cable and manufacturing met...
- Patent number 11,674,386
- Issue date Jun 13, 2023
- SHINDA(TANGSHAN) CREATIVE OIL & GAS EQUIPMENT CO., LTD.
- Jianliang Duan
- E21 - EARTH DRILLING MINING

Patents Applicationslast 30 patents

Information Patent Application
LOGGING ENCAPSULATED OPTICAL-FIBER DUCT CABLE AND MANUFACTURING MET...
- Publication number 20210355820
- Publication date Nov 18, 2021
- Jianliang Duan
- E21 - EARTH DRILLING MINING