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Automatic damper device
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Patent number 4,249,883
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Issue date Feb 10, 1981
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Save Fuel Corporation
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Charles E. Woolfolk
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F24 - HEATING RANGES VENTILATING
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Safety control for furnace burner
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Patent number 4,204,833
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Issue date May 27, 1980
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Scotty Vent Dampers
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Edward R. Kmetz
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F23 - COMBUSTION APPARATUS COMBUSTION PROCESSES
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Automatic damper assembly
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Patent number 4,189,090
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Issue date Feb 19, 1980
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Gerald E. Drinkuth
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F23 - COMBUSTION APPARATUS COMBUSTION PROCESSES
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Energy-conserving flue damper
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Patent number 4,079,884
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Issue date Mar 21, 1978
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Gerald Michael Sherman
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F23 - COMBUSTION APPARATUS COMBUSTION PROCESSES
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Marine stove safety controls
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Patent number 4,052,136
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Issue date Oct 4, 1977
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Ralph L. Ulricksen
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F23 - COMBUSTION APPARATUS COMBUSTION PROCESSES
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Stack damper control arrangement
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Patent number 4,017,024
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Issue date Apr 12, 1977
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Johnson Controls, Inc.
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Martin Coiner Grostick
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F23 - COMBUSTION APPARATUS COMBUSTION PROCESSES
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3768956
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Patent number 3,768,956
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Issue date Oct 30, 1973
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F23 - COMBUSTION APPARATUS COMBUSTION PROCESSES
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3650262
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Patent number 3,650,262
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Issue date Mar 21, 1972
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F24 - HEATING RANGES VENTILATING
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3042769
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Patent number 3,042,769
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Issue date Jul 3, 1962
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F23 - COMBUSTION APPARATUS COMBUSTION PROCESSES
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2319711
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Patent number 2,319,711
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Issue date May 18, 1943
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F23 - COMBUSTION APPARATUS COMBUSTION PROCESSES
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2112554
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Patent number 2,112,554
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Issue date Mar 29, 1938
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F23 - COMBUSTION APPARATUS COMBUSTION PROCESSES