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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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