Chen-Lang Fan

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Junghe City, TW

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Patents Grantslast 30 patents

Information Patent Grant
Wireless blackboard eraser and dust collector
- Patent number 7,222,391
- Issue date May 29, 2007
- Chen-Lang Fan
- B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES

Patents Applicationslast 30 patents

Information Patent Application
Wireless blackboard eraser and dust collector
- Publication number 20040211022
- Publication date Oct 28, 2004
- Chen-Lang Fan
- B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES