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Locking hinge for folding ladder
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Patent number 7,234,203
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Issue date Jun 26, 2007
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Werner Co.
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Brett A. Latimer
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E06 - DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL LADDERS
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Posting ladder
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Patent number 7,044,270
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Issue date May 16, 2006
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Werner Co.,
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Kevin McIntire
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E06 - DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL LADDERS
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Ladder lash
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Patent number 5,067,588
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Issue date Nov 26, 1991
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R. D. Werner Co., Inc.
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Roy B. Bendickson
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E06 - DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL LADDERS