JINGWEI HE

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Xuzhou, CN

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Patents Grantslast 30 patents

Information Patent Grant
Detachable combined-type drive key for rotary drilling rig power head
- Patent number 10,041,298
- Issue date Aug 7, 2018
- XUZHOU XUGONG FOUNDATION CONSTRUCTION MACHINERY CO., LTD
- Xiaoliang Li
- E21 - EARTH DRILLING MINING

Patents Applicationslast 30 patents

Information Patent Application
DETACHABLE COMBINED-TYPE DRIVE KEY FOR ROTARY DRILLING RIG POWER HEAD
- Publication number 20160032652
- Publication date Feb 4, 2016
- XUZHOU XUGONG FOUNDATION CONSTRUCTION MACHINERY CO., LTD.
- XIAOLIANG LI
- E21 - EARTH DRILLING MINING