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  • Publication Date: December 31, 1969
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Cited By (12)

    Publication numberPublication dateAssigneeTitle
    US-4090664-AMay 23, 1978Johnson & Starley LimitedTri-state electrical circuit
    US-4136730-AJanuary 30, 1979Kinsey Bernard BHeating and cooling efficiency control
    US-4401261-AAugust 30, 1983Brown Leeroy WFlue gas heat recovery apparatus
    US-4414957-ANovember 15, 1983Ting Enterprises, Inc.Fireplace and stove apparatus
    US-4518032-AMay 21, 1985Hitachi, Ltd.Temperature control apparatus for automobile air-conditioning systems
    US-4583683-AApril 22, 1986Kubota Trane Ltd.Air conditioning system utilizing a Karman vortex detecting type flowmeter
    US-4629113-ADecember 16, 1986Rhr, Inc.Furnace controller
    US-4684060-AAugust 04, 1987Honeywell Inc.Furnace fan control
    US-4842190-AJune 27, 1989Ortech Industries, Inc.Control circuit for a forced-air heating system
    US-4907737-AMarch 13, 1990R. E. Phelon Company, Inc.Electronic control system for a gas-fired/hot air furnace with induced draft blower
    US-5449275-ASeptember 12, 1995Gluszek; Andrzej, Gluszek; Jolanta M.Controller and method for operation of electric fan
    US-6786225-B1September 07, 2004Emerson Electric Co.Three-stage relay control