Zhongmin Duan

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Guangzhou, CN

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Patents Grantslast 30 patents

Information Patent Grant
Electric pencil sharpener
- Patent number 10,703,129
- Issue date Jul 7, 2020
- NINGBO WEISHU STATIONERY CO., LTD
- Changhai Dai
- B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES
Information Patent Grant
Electric stapler
- Patent number 10,556,363
- Issue date Feb 11, 2020
- NINGBO WEISHU STATIONERY CO., LTD
- Zhongmin Duan
- B27 - WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL NAILING OR STAPLING MACH...
Information Patent Grant
Fully-automatic pencil sharpener
- Patent number 9,669,651
- Issue date Jun 6, 2017
- GuangZhou PanYu Tung Yung Stationery MFY., LTD.
- Liangchun Zhong
- B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES

Patents Applicationslast 30 patents

Information Patent Application
ELECTRIC PENCIL SHARPENER
- Publication number 20180319203
- Publication date Nov 8, 2018
- NINGBO WEISHU STATIONERY CO., LTD
- Changhai DAI
- B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES
Information Patent Application
ELECTRIC STAPLER
- Publication number 20180319036
- Publication date Nov 8, 2018
- NINGBO WEISHU STATIONERY CO., LTD
- Zhongmin DUAN
- B25 - HAND TOOLS PORTABLE POWER-DRIVEN TOOLS MANIPULATORS
Information Patent Application
FULLY-AUTOMATIC PENCIL SHARPENER
- Publication number 20150000791
- Publication date Jan 1, 2015
- GuangZhou PanYu Tung Yung Stationery MFY., LTD.
- Liangchun ZHONG
- B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES
Information Patent Application
STAPLE-EJECTING TYPE STAPLER
- Publication number 20140284369
- Publication date Sep 25, 2014
- GuangZhou PanYu Tung Yung Stationery MFY., LTD.
- Xiaorong Yang
- B25 - HAND TOOLS PORTABLE POWER-DRIVEN TOOLS MANIPULATORS