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Step stool
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Patent number 6,550,579
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Issue date Apr 22, 2003
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Cosco Management, Inc.
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William R. Gibson
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E06 - DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL LADDERS
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Utility tray for step stool
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Patent number 6,536,557
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Issue date Mar 25, 2003
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Cosco Management, Inc.
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William R. Gibson
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E06 - DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL LADDERS
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Step stool
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Patent number D465289
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Issue date Nov 5, 2002
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Cosco Management, Inc.
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William R. Gibson
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D25 - Building units and construction elements
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Step stool
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Patent number 6,443,261
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Issue date Sep 3, 2002
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Cosco Management, Inc.
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William R. Gibson
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E06 - DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL LADDERS
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Folding step stool
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Patent number 6,427,805
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Issue date Aug 6, 2002
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Cosco Management, Inc.
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William R. Gibson
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E06 - DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL LADDERS
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Step stool
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Patent number D444574
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Issue date Jul 3, 2001
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Cosco Management, Inc.
-
William R. Gibson
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D25 - Building units and construction elements
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Step stool
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Patent number D433156
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Issue date Oct 31, 2000
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Cosco Management, Inc.
-
William R. Gibson
-
D25 - Building units and construction elements
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Folding step stool
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Patent number D414566
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Issue date Sep 28, 1999
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Cosco, Inc.
-
William R. Gibson
-
D25 - Building units and construction elements
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Step stool
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Patent number 5,937,968
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Issue date Aug 17, 1999
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Cosco, Inc.
-
William R. Gibson
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E06 - DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL LADDERS