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Patents Grantslast 30 patents

Information Patent Grant
Reinforcement system at railway tunnel section passing through kars...
- Patent number 11,686,198
- Issue date Jun 27, 2023
- CHINA RAILWAY 18 BUREAU GROUP CO. LTD.
- Xin Zhang
- E21 - EARTH DRILLING MINING

Patents Applicationslast 30 patents

Information Patent Application
REINFORCEMENT SYSTEM AT RAILWAY TUNNEL SECTION PASSING THROUGH KARS...
- Publication number 20230068068
- Publication date Mar 2, 2023
- CHINA RAILWAY 18 BUREAU GROUP CO. LTD.
- Xin ZHANG
- E21 - EARTH DRILLING MINING