Ying-Chin CHAO

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Yen Chao Hsiang, TW

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Patents Applicationslast 30 patents

Information Patent Application
METHOD FOR MANUFACTURING SCREW WITH HELICAL CHIP DISCHARGE CHANNEL...
- Publication number 20110044785
- Publication date Feb 24, 2011
- Ying-Chin CHAO
- B21 - MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL PUNCHING...