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Step stool
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Patent number 6,026,933
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Issue date Feb 22, 2000
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Cosco, Inc.
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Raymond P. King
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E06 - DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL LADDERS
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Detachable tray for step stool
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Patent number 6,000,497
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Issue date Dec 14, 1999
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Cosco, Inc.
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James M. Kain
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E06 - DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL LADDERS