Portable utility ladder

Details Portable utility ladder Portable utility ladder

1996-08-20

1998-03-24

Clark, Doris

Building units and construction elements

Stair, ladder, scaffold, or similar support

Stepped

2504

Patent

active

D03927440

REFERENCES:
patent: D179892 (1957-03-01), Gastright
patent: 4182431 (1980-01-01), Wing
patent: 4613013 (1986-09-01), Watling
patent: 5086872 (1992-02-01), Lin

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