Chengzhen WANG

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Ji'nan, Shandong, CN

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Patents Grantslast 30 patents

Information Patent Grant
Method and apparatus for controlling stratum deformation in shield...
- Patent number 11,927,098
- Issue date Mar 12, 2024
- CHINA RAILWAY 14TH BUREAU GROUP CO., LTD.
- Jian Chen
- E21 - EARTH DRILLING MINING
Information Patent Grant
Shield sealing device and shield sealing method
- Patent number 11,905,834
- Issue date Feb 20, 2024
- CHINA RAILWAY 14TH BUREAU GROUP CO., LTD.
- Jian Chen
- E21 - EARTH DRILLING MINING

Patents Applicationslast 30 patents

Information Patent Application
Shield Sealing Device and Shield Sealing Method
- Publication number 20230037876
- Publication date Feb 9, 2023
- CHINA RAILWAY 14TH BUREAU GROUP CO., LTD.
- Jian CHEN
- E21 - EARTH DRILLING MINING
Information Patent Application
Method and Apparatus for Controlling Stratum Deformation in Shield...
- Publication number 20220397036
- Publication date Dec 15, 2022
- CHINA RAILWAY 14TH BUREAU GROUP CO., LTD.
- Jian CHEN
- E21 - EARTH DRILLING MINING