Cheng-Chuan Lu

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Tainan, TW

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Patents Grantslast 30 patents

Information Patent Grant
Anti-loose screw and a die device for forming same
- Patent number 9,140,292
- Issue date Sep 22, 2015
- Cheng-Chuan Lu
- B21 - MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL PUNCHING...

Patents Applicationslast 30 patents

Information Patent Application
Anti-Loose Screw and a Die Device for Forming Same
- Publication number 20150050102
- Publication date Feb 19, 2015
- Cheng-Chuan Lu
- B21 - MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL PUNCHING...