Owen Chang

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Tachia, TW

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Patents Applicationslast 30 patents

Information Patent Application
Method for making a bicycle frame part
- Publication number 20050092050
- Publication date May 5, 2005
- Owen Chang
- B21 - MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL PUNCHING...
Information Patent Application
Process for making a bicycle frame part, and bicycle frame includin...
- Publication number 20030178808
- Publication date Sep 25, 2003
- Owen Chang
- B21 - MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL PUNCHING...