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Wenping Liu

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  • Jiangsu, CN
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Patents Grantslast 30 patents

  • Information Patent Grant

    Helical locking mechanism for doors
    • Patent number 8,291,783
    • Issue date Oct 23, 2012
    • Nanjing Kangni Mechanical & Electrical Co., Ltd.
    • Xiang Shi
    • E05 - LOCKS KEYS WINDOW OR DOOR FITTINGS SAFES

Patents Applicationslast 30 patents

  • Information Patent Application

    POWERLESS HELICAL LOCKING MECHANISM FOR DOOR
    • Publication number 20100319259
    • Publication date Dec 23, 2010
    • NANJING KANGNI NEW TECHNOLOGY OF MECHANTRONIC CO., LTD.
    • Xiang Shi
    • E05 - LOCKS KEYS WINDOW OR DOOR FITTINGS SAFES