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Integrally hinged stile
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Patent number 10,745,962
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Issue date Aug 18, 2020
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Arconic Technologies LLC
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Michael D. Mitchell
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E06 - DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL LADDERS
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Floating flapper valve
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Patent number 8,584,411
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Issue date Nov 19, 2013
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Alcoa Inc.
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Michael D. Mitchell
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E06 - DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL LADDERS