Unfolding stepladder

Details Unfolding stepladder Unfolding stepladder

2007-04-24

2007-04-24

Clark, Doris (Department: 2914)

Building units and construction elements

Stair, ladder, scaffold, or similar support

Stepped

Design Patent

active

29240778

CLAIM:
The ornamental design for an unfolding stepladder, as shown and described.

REFERENCES:
patent: 4442919 (1984-04-01), Fulcher
patent: 5085291 (1992-02-01), Narramore
patent: D388882 (1998-01-01), Kain
patent: D425209 (2000-05-01), Cox
patent: 6220389 (2001-04-01), Krause

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