Leiying He

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Zhengzhou, CN

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Patents Grantslast 30 patents

Information Patent Grant
Grouting method for anchoring with polymer
- Patent number 9,004,820
- Issue date Apr 14, 2015
- SAFEKEY Engineering Technology(Zhengzhou), Ltd.
- Fuming Wang
- E21 - EARTH DRILLING MINING

Patents Applicationslast 30 patents

Information Patent Application
Grouting method for anchoring with polymer
- Publication number 20140314503
- Publication date Oct 23, 2014
- Henan Polytech Infrastructure Rehabilitation LTD.
- Fuming Wang
- E21 - EARTH DRILLING MINING