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David Martin Ellis

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  • Cypress, TX, US
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Patents Grantslast 30 patents

  • Information Patent Grant

    Wellbore tubular air quenching
    • Patent number 11,198,919
    • Issue date Dec 14, 2021
    • National-Oilwell Varco, L.P.
    • David Martin Ellis
    • C21 - METALLURGY OF IRON
  • Information Patent Grant

    Wellbore tubular air quenching
    • Patent number 10,344,346
    • Issue date Jul 9, 2019
    • National-Oilwell Varco, L.P.
    • David Martin Ellis
    • C21 - METALLURGY OF IRON

Patents Applicationslast 30 patents

  • Information Patent Application

    WELLBORE TUBULAR AIR QUENCHING
    • Publication number 20190276908
    • Publication date Sep 12, 2019
    • National-Oilwell Varco, L.P.
    • David Martin Ellis
    • H05 - ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
  • Information Patent Application

    WELLBORE TUBULAR AIR QUENCHING
    • Publication number 20160298206
    • Publication date Oct 13, 2016
    • David Martin Ellis
    • C21 - METALLURGY OF IRON