Mobile step-ladder

Details Mobile step-ladder Mobile step-ladder

2006-07-11

2006-07-11

Clark, Doris (Department: 2914)

Building units and construction elements

Stair, ladder, scaffold, or similar support

Stepped

Design Patent

active

D0524950

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

REFERENCES:
patent: 2203445 (1940-06-01), Schwarz et al.
patent: D162132 (1951-02-01), Dole
patent: D238320 (1976-01-01), Smith et al.
patent: D306487 (1990-03-01), Fowler, Jr.
patent: 6116378 (2000-09-01), Barrow

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