Chengguo Zhang

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Qingdao, CN

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Patents Grantslast 30 patents

Information Patent Grant
Drilling device for coal mining
- Patent number 12,018,534
- Issue date Jun 25, 2024
- Shandong University of Science and Technology
- Weiyao Guo
- E21 - EARTH DRILLING MINING
Information Patent Grant
Dynamic load shearing test device and method based on hopkinson bar...
- Patent number 11,821,874
- Issue date Nov 21, 2023
- Shandong University of Science and Technology
- Xufei Gong
- G01 - MEASURING TESTING