Dongfang Chen

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Wuhan, CN

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Patents Grantslast 30 patents

Information Patent Grant
Convex crested insert with deflected wedge surfaces
- Patent number 8,360,175
- Issue date Jan 29, 2013
- Kingdream Public Ltd. Co.
- Xiaobing Fan
- E21 - EARTH DRILLING MINING

Patents Applicationslast 30 patents

Information Patent Application
Convex Crested Insert With Deflected Wedge Surfaces
- Publication number 20100300766
- Publication date Dec 2, 2010
- KINGDREAM PUBLIC LTD. CO.
- Xiaobing Fan
- E21 - EARTH DRILLING MINING