Sun Hongtao

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Shenzhen City, CN

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Patents Grantslast 30 patents

Information Patent Grant
Electric pencil sharpener
- Patent number 7,669,619
- Issue date Mar 2, 2010
- Yurisheng Electronic (Shenzhen) Co., Ltd
- Hongtao Sun
- B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES

Patents Applicationslast 30 patents

Information Patent Application
ELECTRIC PENCIL SHARPENER
- Publication number 20080149220
- Publication date Jun 26, 2008
- YURISHENG ELECTRONIC (SHENZHEN) CO., LTD
- Sun Hongtao
- B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES