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Yunzhao CHEN

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  • Kelamayi City, Xinjiang, CN
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Patents Grantslast 30 patents

  • Information Patent Grant

    Multi-way valve
    • Patent number 10,323,756
    • Issue date Jun 18, 2019
    • WUHU KING-BULL INFORTEC PETROLEUM EQUIPMENT CO., LTD.
    • Mingmin Wan
    • F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
  • Information Patent Grant

    Valve seat ring and multi-way valve having valve seat ring
    • Patent number 9,958,074
    • Issue date May 1, 2018
    • KELAMAYI KING-BULL INFORTEC PETROLEUM EQUIPMENT CO., LTD.
    • Mingmin Wan
    • E21 - EARTH DRILLING MINING

Patents Applicationslast 30 patents

  • Information Patent Application

    MULTI-WAY VALVE
    • Publication number 20180010698
    • Publication date Jan 11, 2018
    • WUHU KING-BULL INFORTEC PETROLEUM EQUIPMENT CO., LTD.
    • Mingmin WAN
    • F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
  • Information Patent Application

    VALVE SEAT RING AND MULTI-WAY VALVE HAVING VALVE SEAT RING
    • Publication number 20170130850
    • Publication date May 11, 2017
    • KELAMAYI KING-BULL INFORTEC PETROLEUM EQUIPMENT CO., LTD.
    • Mingmin WAN
    • E21 - EARTH DRILLING MINING