Ladder

Details Ladder Ladder

2009-06-03

2009-10-06

Clark, Doris (Department: 2914)

Building units and construction elements

Stair, ladder, scaffold, or similar support

Stepped

Design Patent

active

D0601719

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

REFERENCES:
patent: 3590951 (1971-07-01), Berger
patent: D392744 (1998-03-01), Staal
patent: D442289 (2001-05-01), Ziaylek et al.
patent: 6840350 (2005-01-01), Deal

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