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Duane Preston

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  • Mentor, OH, US
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Patents Grantslast 30 patents

  • Information Patent Grant

    Decompression coupling block
    • Patent number 9,976,659
    • Issue date May 22, 2018
    • Holmbury, Ltd.
    • Duane S. Preston
    • E02 - HYDRAULIC ENGINEERING FOUNDATIONS SOIL SHIFTING
  • Information Patent Grant

    Underground piercing tool
    • Patent number 7,836,976
    • Issue date Nov 23, 2010
    • Allied Construction Products, L.L.C.
    • Duane Preston
    • E21 - EARTH DRILLING MINING

Patents Applicationslast 30 patents

  • Information Patent Application

    DECOMPRESSION COUPLING BLOCK
    • Publication number 20160348799
    • Publication date Dec 1, 2016
    • Duane S. Preston
    • F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
  • Information Patent Application

    Underground piercing tool
    • Publication number 20070175646
    • Publication date Aug 2, 2007
    • Allied Construction Products, L.L.C.
    • Duane Preston
    • E21 - EARTH DRILLING MINING