Po-Cheng Li

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Caotun Township, TW

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Patents Grantslast 30 patents

Information Patent Grant
Chalk-dust collecting apparatus for blackboard eraser
- Patent number 7,448,112
- Issue date Nov 11, 2008
- Global Metal Supplier Corp.
- Po-Cheng Li
- B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES

Patents Applicationslast 30 patents

Information Patent Application
Chalk-dust collecting apparatus for blackboard eraser
- Publication number 20080155778
- Publication date Jul 3, 2008
- Global Metal Supplier Corp.
- Po-Cheng Li
- B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES