TREA

Earl M. Kelly

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  • Hillsborough, CA, US
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Patents Grantslast 30 patents

  • Information Patent Grant

    Sewage treatment system and process
    • Patent number 4,271,027
    • Issue date Jun 2, 1981
    • Envirotech Corporation
    • Earl M. Kelly
    • C02 - TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
  • Information Patent Grant

    Sludge thickening apparatus and process
    • Patent number 4,173,534
    • Issue date Nov 6, 1979
    • Envirotech Corporation
    • Earl M. Kelly
    • C02 - TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
  • Information Patent Grant

    Sludge thickening apparatus
    • Patent number 4,082,671
    • Issue date Apr 4, 1978
    • Envirotech Corporation
    • Earl M. Kelly
    • C02 - TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE