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Harold J. Ledbetter

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  • Owasso, OK, US
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Patents Grantslast 30 patents

  • Information Patent Grant

    Pressure relief valve
    • Patent number 5,782,259
    • Issue date Jul 21, 1998
    • Harold J. Ledbetter
    • F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
  • Information Patent Grant

    Pressure release valve
    • Patent number 5,094,266
    • Issue date Mar 10, 1992
    • Harold J. Ledbetter
    • F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...