Weijian Chen

Follow

Person

Guangdong, CN

People

Patents Grantslast 30 patents

Information Patent Grant
Ink cartridge refilling device and ink cartridge refilling method u...
- Patent number 9,630,415
- Issue date Apr 25, 2017
- Zhuhai Ninestar Management Co., Ltd.
- Lei Qing
- B41 - PRINTING LINING MACHINES TYPEWRITERS STAMPS

Patents Applicationslast 30 patents

Information Patent Application
INK CARTRIDGE REFILLING DEVICE AND INK CARTRIDGE REFILLING METHOD U...
- Publication number 20130037164
- Publication date Feb 14, 2013
- Lei Qing
- B41 - PRINTING LINING MACHINES TYPEWRITERS STAMPS