TREA

William F. Helwig Jr.

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  • Downers Grove, IL, US
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Patents Grantslast 30 patents

  • Information Patent Grant

    Ground fault and fire detector system
    • Patent number RE31147
    • Issue date Feb 8, 1983
    • Avtec Industries, Inc.
    • William F. Helwig
    • 361 - Electricity: electrical systems and devices
  • Information Patent Grant

    Energy saving dishwashing method with heater control
    • Patent number 4,331,484
    • Issue date May 25, 1982
    • William F. Helwig
    • A47 - FURNITURE DOMESTIC ARTICLES OR APPLIANCES COFFEE MILLS SPICE MILLS SUCT...
  • Information Patent Grant

    Electric current detector circuit
    • Patent number 4,316,229
    • Issue date Feb 16, 1982
    • Avtec Industries, Inc.
    • William F. Helwig
    • H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
  • Information Patent Grant

    Energy saving dishwasher
    • Patent number 4,315,140
    • Issue date Feb 9, 1982
    • Avtec Industries, Inc.
    • William F. Helwig
    • A47 - FURNITURE DOMESTIC ARTICLES OR APPLIANCES COFFEE MILLS SPICE MILLS SUCT...
  • Information Patent Grant

    Energy saving dishwasher
    • Patent number 4,254,788
    • Issue date Mar 10, 1981
    • Avtec Industries, Inc.
    • William F. Helwig
    • A47 - FURNITURE DOMESTIC ARTICLES OR APPLIANCES COFFEE MILLS SPICE MILLS SUCT...
  • Information Patent Grant

    Energy management system
    • Patent number 4,180,744
    • Issue date Dec 25, 1979
    • Avtec Industries, Inc.
    • William F. Helwig
    • H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
  • Information Patent Grant

    Ground fault and fire detector system
    • Patent number 4,163,269
    • Issue date Jul 31, 1979
    • Avtec Industries, Inc.
    • William F. Helwig
    • H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
  • Information Patent Grant

    Delay circuit
    • Patent number 4,156,432
    • Issue date May 29, 1979
    • Avtec Industries, Inc.
    • William F. Helwig
    • H01 - BASIC ELECTRIC ELEMENTS