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Dual shape assembly
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Patent number 5,647,421
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Issue date Jul 15, 1997
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Hunter Douglas Inc.
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Brian M. Hoffmann
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E06 - DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL LADDERS
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Window covering assembly
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Patent number 5,287,908
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Issue date Feb 22, 1994
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Hunter Douglas Inc.
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Brian M. Hoffmann
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E06 - DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL LADDERS