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Liping Wang

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  • Yuyao City, CN
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Patents Grantslast 30 patents

  • Information Patent Grant

    Direct-liquid writing instrument
    • Patent number 10,919,335
    • Issue date Feb 16, 2021
    • NINGBO WUYUN PEN MANUFACTURING CO., LTD.
    • Yang Wen
    • B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES
  • Information Patent Grant

    Writing instrument having an ink balance mechanism
    • Patent number 9,266,380
    • Issue date Feb 23, 2016
    • NINGBO WUYUN PEN MANUFACTURING CO., LTD.
    • Liping Wang
    • B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES

Patents Applicationslast 30 patents

  • Information Patent Application

    DIRECT-LIQUID WRITING INSTRUMENT
    • Publication number 20190248171
    • Publication date Aug 15, 2019
    • NINGBO WUYUN PEN MANUFACTURING CO., LTD.
    • Yang WEN
    • B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES
  • Information Patent Application

    Writing instrument having an ink balance mechanism
    • Publication number 20150063894
    • Publication date Mar 5, 2015
    • Microporous Technology (Ningbo) Limited
    • Yang Wen
    • B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES