TREA

Calvin J. Holtkamp

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  • Mansfield, OH, US
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Patents Grantslast 30 patents

  • Information Patent Grant

    Oven thermostat
    • Patent number 5,025,242
    • Issue date Jun 18, 1991
    • Robertshaw Controls Company, Inc.
    • Calvin J. Holtkamp
    • H01 - BASIC ELECTRIC ELEMENTS
  • Information Patent Grant

    Thermal cycling switch
    • Patent number 4,471,338
    • Issue date Sep 11, 1984
    • White Consolidated Industries, Inc.
    • Calvin J. Holtkamp
    • H01 - BASIC ELECTRIC ELEMENTS
  • Information Patent Grant

    Multi-function self-cleaning oven thermostat
    • Patent number 4,214,224
    • Issue date Jul 22, 1980
    • White Consolidated Industries, Inc.
    • Calvin J. Holtkamp
    • F24 - HEATING RANGES VENTILATING
  • Information Patent Grant

    Push-to-turn thermal cycling switch
    • Patent number 3,932,830
    • Issue date Jan 13, 1976
    • White-Westinghouse Corporation
    • Calvin J. Holtkamp
    • H01 - BASIC ELECTRIC ELEMENTS