Leveling attachment for supports, such as ladders, scaffolds, trestles, and the like
United States Patent 3394774
US Patent References:
Ladder
- - 1555483

Ladder foot
- - 1592499

Adjustable scaffold
- - 2556611

Adjustable extension device
- - 2581782

Screen frame fixture
- - 3047061


Inventors:
Lanier, John E.
Publication Date:
07/30/1968
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Primary Class:
182/204
International Classes:
E06C7/44; E06C7/00