Yingen Zhang

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Chumen Town, CN

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Patents Grantslast 30 patents

Information Patent Grant
Universal hole cutter
- Patent number 8,667,790
- Issue date Mar 11, 2014
- Yingen Zhang
- B21 - MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL PUNCHING...

Patents Applicationslast 30 patents

Information Patent Application
UNIVERSAL HOLE CUTTER
- Publication number 20110297244
- Publication date Dec 8, 2011
- Yingen Zhang
- B21 - MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL PUNCHING...