Jen-Pen Chang

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Wuri Shiang, TW

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Patents Grantslast 30 patents

Information Patent Grant
Grinding disc structure
- Patent number 7,094,138
- Issue date Aug 22, 2006
- Jen-Pen Chang
- B24 - GRINDING POLISHING

Patents Applicationslast 30 patents

Information Patent Application
Liquid draining valve structure
- Publication number 20060076054
- Publication date Apr 13, 2006
- Jen-Pen Chang
- B60 - VEHICLES IN GENERAL
Information Patent Application
Grinding disc structure
- Publication number 20050202769
- Publication date Sep 15, 2005
- Jen-Pen Chang
- B24 - GRINDING POLISHING