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Christopher E. Grewell

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  • Portland, OR, US
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Patents Grantslast 30 patents

  • Information Patent Grant

    Pin assembly
    • Patent number 11,401,686
    • Issue date Aug 2, 2022
    • ESCO Group LLC
    • Christopher E. Grewell
    • E02 - HYDRAULIC ENGINEERING FOUNDATIONS SOIL SHIFTING

Patents Applicationslast 30 patents

  • Information Patent Application

    WEAR ASSEMBLY
    • Publication number 20220333358
    • Publication date Oct 20, 2022
    • ESCO Group LLC
    • Clinton A. Wood
    • E02 - HYDRAULIC ENGINEERING FOUNDATIONS SOIL SHIFTING
  • Information Patent Application

    PIN LOCK ASSEMBLY
    • Publication number 20210246935
    • Publication date Aug 12, 2021
    • ESCO Group LLC
    • Christopher E. Grewell
    • F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
  • Information Patent Application

    PIN ASSEMBLY
    • Publication number 20180080195
    • Publication date Mar 22, 2018
    • Esco Corporation
    • Christopher E. Grewell
    • E02 - HYDRAULIC ENGINEERING FOUNDATIONS SOIL SHIFTING