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Pivot block connection
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Patent number 8,813,912
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Issue date Aug 26, 2014
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Sam Carbis Asset Management, LLC
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Ronald W. Bennett
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B66 - HOISTING LIFTING HAULING
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Embankment stairway
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Patent number 6,527,081
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Issue date Mar 4, 2003
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Aluminum Ladder Company,
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Sandy W. Tyner
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E06 - DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL LADDERS