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Michael E. Drager

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  • St. Paul, MN, US
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Patents Grantslast 30 patents

  • Information Patent Grant

    Bypass valve for a liquid treatment tank
    • Patent number D337633
    • Issue date Jul 20, 1993
    • Ecowater Systems, Inc.
    • Michael E. Drager
    • D23 - Environmental heating and cooling
  • Information Patent Grant

    Water softener control and indicating panel
    • Patent number D336051
    • Issue date Jun 1, 1993
    • Ecowater Systems, Inc.
    • Michael E. Drager
    • D10 - Measuring, testing, or signalling instruments
  • Information Patent Grant

    Rotary flow control valve
    • Patent number 5,162,080
    • Issue date Nov 10, 1992
    • Ecowater Systems, Inc.
    • Michael E. Drager
    • C02 - TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
  • Information Patent Grant

    Bypass valve
    • Patent number 5,152,321
    • Issue date Oct 6, 1992
    • Ecowater Systems, Inc.
    • Michael Drager
    • F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
  • Information Patent Grant

    Water softener
    • Patent number D328330
    • Issue date Jul 28, 1992
    • Ecowater Systems, Inc.
    • Michael E. Drager
    • D23 - Environmental heating and cooling
  • Information Patent Grant

    Water softener
    • Patent number D328331
    • Issue date Jul 28, 1992
    • Ecowater Systems, Inc.
    • Michael E. Drager
    • D23 - Environmental heating and cooling