YONG SANG

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SHANGHAI, CN

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Patents Grantslast 30 patents

Information Patent Grant
Ink composition and a writing instrument
- Patent number 9,765,229
- Issue date Sep 19, 2017
- SHANGHAI NNW NEW MATERIALS TECHNOLOGY CO., LTD.
- Wei Qian
- B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES

Patents Applicationslast 30 patents

Information Patent Application
INK COMPOSITION AND A WRITING INSTRUMENT
- Publication number 20160145454
- Publication date May 26, 2016
- SHANGHAI NNW NEW MATERIALS TECHNOLOGY CO., LTD.
- WEI QIAN
- B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES