Foldable step ladder

Details Foldable step ladder Foldable step ladder

2006-06-13

2006-06-13

Clark, Doris (Department: 2914)

Building units and construction elements

Stair, ladder, scaffold, or similar support

Stepped

Design Patent

active

D0523155

CLAIM:
The ornamental design for a foldable step ladder, as shown and described.

REFERENCES:
patent: 949614 (1910-02-01), Blundell
patent: 2280691 (1942-04-01), Edelmann
patent: 3085652 (1963-04-01), Rich
patent: 3446311 (1969-05-01), Alfie
patent: 5342008 (1994-08-01), Kay
patent: D387878 (1997-12-01), Jacques
patent: D388882 (1998-01-01), Kain
patent: 5967260 (1999-10-01), Spak
patent: 6450290 (2002-09-01), Spak

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