Weijian Chen

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Zhuhai, CN

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Patents Grantslast 30 patents

Information Patent Grant
Negative-pressure ink cartridge refilling device, system and method
- Patent number 8,733,909
- Issue date May 27, 2014
- Zhuhai Ninestar Managament Co., Ltd.
- Lei Qin
- B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES