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Duct close elbow
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Patent number D342782
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Issue date Dec 28, 1993
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Builder's Best, Inc.
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Charles B. Anderson
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D23 - Environmental heating and cooling
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Duct offset elbow
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Patent number D342130
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Issue date Dec 7, 1993
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Builder's Best, Inc.
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Charles B. Anderson
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D23 - Environmental heating and cooling
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Universal duct elbow and connector plate
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Patent number 5,158,328
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Issue date Oct 27, 1992
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Builders Pride Inc.
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Charles B. Anderson
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D06 - TREATMENT OF TEXTILES OR THE LIKE LAUNDERING FLEXIBLE MATERIALS NOT OTH...
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Universal dryer duct and vent
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Patent number 5,145,217
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Issue date Sep 8, 1992
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Builder's Pride, Inc.
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Charles B. Anderson
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D06 - TREATMENT OF TEXTILES OR THE LIKE LAUNDERING FLEXIBLE MATERIALS NOT OTH...
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-
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Carton construction for flexible duct
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Patent number 5,058,741
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Issue date Oct 22, 1991
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Atco Rubber Products, Inc.
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Charles B. Anderson
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B65 - CONVEYING PACKING STORING HANDLING THIN OR FILAMENTARY MATERIAL
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Flexible duct and carton
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Patent number 4,987,996
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Issue date Jan 29, 1991
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Atco Rubber Products, Inc.
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Charles B. Anderson
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B65 - CONVEYING PACKING STORING HANDLING THIN OR FILAMENTARY MATERIAL
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Insulated duct end system
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Patent number 4,890,864
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Issue date Jan 2, 1990
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C-System Incorporated
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Charles B. Anderson
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F24 - HEATING RANGES VENTILATING
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Insulated duct end system
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Patent number 4,735,235
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Issue date Apr 5, 1988
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C-System Incorporated
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Charles B. Anderson
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F24 - HEATING RANGES VENTILATING