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Joint structure
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Patent number 5,086,601
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Issue date Feb 11, 1992
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Andersen Corporation
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Dennis A. Galowitz
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E06 - DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL LADDERS
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Corner lock
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Patent number 5,010,708
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Issue date Apr 30, 1991
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Anderson Corporation
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Harold H. Evans
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E06 - DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL LADDERS
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Inwardly swinging hinged door assembly
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Patent number 4,999,950
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Issue date Mar 19, 1991
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Andersen Corporation
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Scott R. Beske
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E06 - DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL LADDERS