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Fen Ruan

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  • Zhengzhou, CN
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Patents Grantslast 30 patents

  • Information Patent Grant

    Keys and locks
    • Patent number 10,529,161
    • Issue date Jan 7, 2020
    • Yaowu Ma
    • B60 - VEHICLES IN GENERAL

Patents Applicationslast 30 patents

  • Information Patent Application

    High Air-Tightness Device
    • Publication number 20170222388
    • Publication date Aug 3, 2017
    • Yaowu Ma
    • H01 - BASIC ELECTRIC ELEMENTS
  • Information Patent Application

    Vehicle Key Apparatus
    • Publication number 20170088099
    • Publication date Mar 30, 2017
    • Yaowu Ma
    • B60 - VEHICLES IN GENERAL
  • Information Patent Application

    Keys and Locks
    • Publication number 20160371907
    • Publication date Dec 22, 2016
    • Yaowu Ma
    • B60 - VEHICLES IN GENERAL