Ringsun (Shenzhen) Industrial Limited

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Shenzhen, CN

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Patents Grantslast 30 patents

Information Patent Grant
Electric pencil sharpener
- Patent number 7,726,365
- Issue date Jun 1, 2010
- Ringsun (Shenzhen) Industrial Limited
- Jingyi Hu
- B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES
Information Patent Grant
Finger musical instrument
- Patent number 7,674,969
- Issue date Mar 9, 2010
- Ringsun (Shenzhen) Industrial Limited
- Keduan Xu
- G10 - MUSICAL INSTRUMENTS ACOUSTICS
Information Patent Grant
Electric pencil sharpener
- Patent number 7,581,573
- Issue date Sep 1, 2009
- Ringsun (Shenzhen) Industrial Limited
- Jingyl Hu
- B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES
Information Patent Grant
Electric stapler
- Patent number 7,311,238
- Issue date Dec 25, 2007
- Ringsun (Shenzhen) Industrial Limited
- Yingming Liu
- B25 - HAND TOOLS PORTABLE POWER-DRIVEN TOOLS MANIPULATORS
Information Patent Grant
Automatic pencil sharpener
- Patent number 7,240,703
- Issue date Jul 10, 2007
- Ringsun (Shenzhen) Industrial Limited
- Jingyi Hu
- B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES

Patents Applicationslast 30 patents

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