Junhao Ren

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Beijing, CN

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Patents Grantslast 30 patents

Information Patent Grant
Coal mining system and method of dual circulation drilling with mec...
- Patent number 12,338,721
- Issue date Jun 24, 2025
- CHINA UNIVERSITY OF MINING & TECHNOLOGY, BEIJING
- Yifan Zeng
- E21 - EARTH DRILLING MINING
Information Patent Grant
Integrated mining method of coal breaking, coal extraction and wate...
- Patent number 12,241,371
- Issue date Mar 4, 2025
- CHINA UNIVERSITY OF MINING & TECHNOLOGY, BEIJING
- Yifan Zeng
- E21 - EARTH DRILLING MINING
Information Patent Grant
Coal and coalbed methane mining system based on ground drilling, me...
- Patent number 12,241,340
- Issue date Mar 4, 2025
- CHINA UNIVERSITY OF MINING & TECHNOLOGY, BEIJING
- Yifan Zeng
- E21 - EARTH DRILLING MINING

Patents Applicationslast 30 patents

Information Patent Application
COAL MINING SYSTEM AND METHOD OF DUAL CIRCULATION DRILLING WITH MEC...
- Publication number 20250172062
- Publication date May 29, 2025
- CHINA UNIVERSITY OF MINING & TECHNOLOGY, BEIJING
- Yifan ZENG
- E21 - EARTH DRILLING MINING