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Ladder hoist assembly
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Patent number 7,318,579
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Issue date Jan 15, 2008
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Pablo Raba Novoa
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E06 - DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL LADDERS
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Shutter assembly
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Patent number 6,968,660
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Issue date Nov 29, 2005
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Pablo Raba Novoa
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E06 - DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL LADDERS