Adjustable step for ladders
United States Patent 3067836
US Patent References:
/D155566.html
- - D155566

Combination ladder bracket
- - 2140828

Ladder step
- - 2432206


Inventors:
Carnicelli, William J.
Publication Date:
12/11/1962
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Assignee:
Carnicelli, William J.
Primary Class:
182/121
International Classes:
E06C7/16; E06C7/00
Foreign References:
CH132835A