Fei MA

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Beijing, CN

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Patents Grantslast 30 patents

Information Patent Grant
Full-face shaft tunnel boring machine system
- Patent number 11,891,865
- Issue date Feb 6, 2024
- HEFEI DESIGN & RESEARCH INSTITUTE OF COAL INDUSTRY CO., LTD
- Huidong Xu
- E21 - EARTH DRILLING MINING
Information Patent Grant
Multi-degree-of-freedom automatic center-adjusting device, hydrauli...
- Patent number 11,035,093
- Issue date Jun 15, 2021
- University of Science and Technology Beijing
- Fei Ma
- E02 - HYDRAULIC ENGINEERING FOUNDATIONS SOIL SHIFTING

Patents Applicationslast 30 patents

Information Patent Application
FULL-FACE SHAFT TUNNEL BORING MACHINE SYSTEM
- Publication number 20240068308
- Publication date Feb 29, 2024
- HEFEI DESIGN & RESEARCH INSTITUTE OF COAL INDUSTRY CO., LTD
- Huidong XU
- E21 - EARTH DRILLING MINING
Information Patent Application
MULTI-DEGREE-OF-FREEDOM AUTOMATIC CENTER-ADJUSTING DEVICE, HYDRAULI...
- Publication number 20210148080
- Publication date May 20, 2021
- UNIVERSITY OF SCIENCE AND TECHNOLOGY BEIJING
- Fei MA
- E02 - HYDRAULIC ENGINEERING FOUNDATIONS SOIL SHIFTING