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Insulating shade device
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Patent number 4,422,492
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Issue date Dec 27, 1983
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Billy M. Bledsoe
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E06 - DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL LADDERS
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Window insulation system
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Patent number 4,359,079
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Issue date Nov 16, 1982
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Billy M. Bledsoe
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E06 - DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL LADDERS