Qian Zhou

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Zhengzhou, CN

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Patents Grantslast 30 patents

Information Patent Grant
Vertical shaft drilling rig using novel drilling method
- Patent number 10,202,807
- Issue date Feb 12, 2019
- Jianbin Li
- E21 - EARTH DRILLING MINING
Information Patent Grant
Center-pillared full-face shaft drilling machine
- Patent number 9,995,086
- Issue date Jun 12, 2018
- Hua Zhao
- E21 - EARTH DRILLING MINING

Patents Applicationslast 30 patents

Information Patent Application
Center-pillared Full-Face Shaft Drilling Machine
- Publication number 20160369629
- Publication date Dec 22, 2016
- CHINA RAILWAY ENGINEERING EQUIPMENT GROUP CO., LTD.
- Hua Zhao
- E21 - EARTH DRILLING MINING
Information Patent Application
Vertical Shaft Drilling Rig Using Novel Drilling Method
- Publication number 20160369566
- Publication date Dec 22, 2016
- CHINA RAILWAY ENGINEERING EQUIPMENT GROUP CO., LTD.
- Jianbin LI
- E21 - EARTH DRILLING MINING