HEBEI FEIPU ENVIRONMENTAL PROTECTION TECHNOLOGY CO. LTD

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Patents Grantslast 30 patents

Information Patent Grant
Method of treating tunnel collapse using pavilion support
- Patent number 11,306,588
- Issue date Apr 19, 2022
- Shandong University of Science and Technology
- Xianghui Meng
- E21 - EARTH DRILLING MINING
Information Patent Grant
Method of treating tunnel collapse with roof-contacted shield support
- Patent number 11,248,464
- Issue date Feb 15, 2022
- Shandong University of Science and Technology
- Lin Xin
- E21 - EARTH DRILLING MINING

Patents Applicationslast 30 patents

Information Patent Application
METHOD OF TREATING TUNNEL COLLAPSE USING PAVILION SUPPORT
- Publication number 20210388724
- Publication date Dec 16, 2021
- SHANDONG UNIVERSITY OF SCIENCE AND TECHNOLOGY
- Xianghui MENG
- E21 - EARTH DRILLING MINING
Information Patent Application
METHOD OF TREATING TUNNEL COLLAPSE WITH ROOF-CONTACTED SHIELD SUPPORT
- Publication number 20210355828
- Publication date Nov 18, 2021
- SHANDONG UNIVERSITY OF SCIENCE AND TECHNOLOGY
- Lin XIN
- E21 - EARTH DRILLING MINING

Trademarklast 30 trademarks