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Passive building vents
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Patent number 5,080,005
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Issue date Jan 14, 1992
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Suroff; Leonard W.
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Stanley Kolt
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F24 - HEATING RANGES VENTILATING
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Automatic damper assembly
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Patent number 4,697,736
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Issue date Oct 6, 1987
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Suroff; Leonard W.
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Stanley Kolt
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F24 - HEATING RANGES VENTILATING
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Passive building vents
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Patent number 4,596,181
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Issue date Jun 24, 1986
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Suroff; Leonard W.
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Stanley Kolt
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F24 - HEATING RANGES VENTILATING
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Energy saver damper assembly
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Patent number 4,591,092
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Issue date May 27, 1986
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Suroff; Leonard W.
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Stanley Kolt
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F24 - HEATING RANGES VENTILATING
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Energy saver damper assembly
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Patent number 4,586,654
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Issue date May 6, 1986
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Suroff; Leonard W.
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Stanley Kolt
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F24 - HEATING RANGES VENTILATING
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Automatic damper assembly
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Patent number 4,582,250
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Issue date Apr 15, 1986
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Suroff; Leonard W.
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Stanley Kolt
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F24 - HEATING RANGES VENTILATING
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Unidirectional vent
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Patent number 4,567,816
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Issue date Feb 4, 1986
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Suroff; Leonard W.
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Stanley Kolt
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F24 - HEATING RANGES VENTILATING
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Energy saver damper assembly
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Patent number 4,520,959
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Issue date Jun 4, 1985
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Suroff; Leonard W.
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Stanley Kolt
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F24 - HEATING RANGES VENTILATING
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Thermostatic assembly
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Patent number 4,507,922
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Issue date Apr 2, 1985
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Suroff; Leonard W.
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Stanley Kolt
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G05 - CONTROLLING REGULATING
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Automatic damper assembly
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Patent number 4,501,389
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Issue date Feb 26, 1985
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Suroff; Leonard W.
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Stanley Kolt
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F24 - HEATING RANGES VENTILATING
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Automatic switch assembly
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Patent number 4,466,402
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Issue date Aug 21, 1984
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Suroff; Leonard W.
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Stanley Kolt
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F02 - COMBUSTION ENGINES HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
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Automatic damper assembly
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Patent number 4,416,415
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Issue date Nov 22, 1983
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Suroff; Leonard W.
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Stanley Kolt
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F24 - HEATING RANGES VENTILATING
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Automatic roof ventilator
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Patent number 4,210,277
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Issue date Jul 1, 1980
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Suroff; Leonard W.
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Stanley Kolt
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F24 - HEATING RANGES VENTILATING
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Automatic ventilator
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Patent number 4,123,001
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Issue date Oct 31, 1978
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Suroff; Leonard W.
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Stanley Kolt
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F24 - HEATING RANGES VENTILATING