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NATIONAL OILWELL VARCO PETROLEUM EQUIPMENT (SHANGHAI) CO., LTD

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  • SHANGHAI, CN
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Patents Grantslast 30 patents

  • Information Patent Grant

    Pump and a valve assembly therefor
    • Patent number 10,662,932
    • Issue date May 26, 2020
    • National Oilwell Varco Petroleum Equipment (Shanghai) Co., Ltd.
    • He Zhang
    • F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...

Patents Applicationslast 30 patents

  • Information Patent Application

    A PUMP AND A VALVE ASSEMBLY THEREFOR
    • Publication number 20180003314
    • Publication date Jan 4, 2018
    • NATIONAL OILWELL VARCO PETROLEUM EQUIPMENT (SHANGHAI) CO., LTD.
    • He ZHANG
    • F04 - POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS FOR LIQUIDS OR ELASTIC...

Trademarklast 30 trademarks