Chi-Hsin Ho

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Tainan City, TW

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Patents Grantslast 30 patents

Information Patent Grant
Apparatus erasing blackboard through areas
- Patent number 8,375,505
- Issue date Feb 19, 2013
- National Central University
- Shu-San Hsiau
- B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES

Patents Applicationslast 30 patents

Information Patent Application
Apparatus Erasing Blackboard through Areas
- Publication number 20110162163
- Publication date Jul 7, 2011
- National Central University
- Shu-San Hsiau
- B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES