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Harry J. Ledgerwood

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  • Marshfield, MO, US
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Patents Grantslast 30 patents

  • Information Patent Grant

    Gasket for hub and spigot pipe joints
    • Patent number 5,649,713
    • Issue date Jul 22, 1997
    • Tyler Pipe Company, a div. of Ransom Industries, Inc.
    • Harry J. Ledgerwood
    • F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
  • Information Patent Grant

    Pipe joint coupling
    • Patent number 4,538,839
    • Issue date Sep 3, 1985
    • Plessey Incorporated
    • Harry J. Ledgerwood
    • F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...