Liang-Liang Yao

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Chang Hua, TW

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Patents Grantslast 30 patents

Information Patent Grant
Electric pencil sharpener with a replaceable cutter assembly
- Patent number 9,555,661
- Issue date Jan 31, 2017
- SDI Corporation
- Che-Chang Cheng
- B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES

Patents Applicationslast 30 patents

Information Patent Application
ELECTRIC PENCIL SHARPENER WITH A REPLACEABLE CUTTER ASSEMBLY
- Publication number 20130186517
- Publication date Jul 25, 2013
- Che-Chang Cheng
- B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES