Cheng-chuan Lu

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Yungkang City, Tainan Hsien, TW

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Patents Grantslast 30 patents

Information Patent Grant
Screw with an improved head structure and punch for forming same
- Patent number 6,293,745
- Issue date Sep 25, 2001
- Cheng Chuan Lu
- F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
Information Patent Grant
Screw having an improved head structure
- Patent number 5,674,037
- Issue date Oct 7, 1997
- Cheng-chuan Lu
- F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...