TREA

ESSEF CORPORATION D.B.A. PENTAIR WATER TREATMENT

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  • CHARDON, OH, US
Organizations

Patents Grantslast 30 patents

  • Information Patent Grant

    Regenerative diatomaceous earth filter
    • Patent number 4,944,887
    • Issue date Jul 31, 1990
    • Essef
    • Stanley H. Frederick
    • B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL