TREA

Douglass H. Powell

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  • Sacramento, CA, US
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Patents Grantslast 30 patents

  • Information Patent Grant

    Backflow prevention apparatus
    • Patent number 6,478,047
    • Issue date Nov 12, 2002
    • Hunter Innovations, Inc.
    • Douglass H. Powell
    • F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...