TREA

Peter A. Freeman

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  • Berlin, MD, US
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Patents Grantslast 30 patents

  • Information Patent Grant

    Water aeration and circulation apparatus
    • Patent number 4,308,137
    • Issue date Dec 29, 1981
    • Peter A. Freeman
    • C02 - TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
  • Information Patent Grant

    Wind-powered impeller-mixer
    • Patent number 4,292,540
    • Issue date Sep 29, 1981
    • Worthington J. Thompson
    • F03 - MACHINES OR ENGINES FOR LIQUIDS WIND, SPRING WEIGHT AND MISCELLANEOUS M...