Title:
Ladder construction
United States Patent 1921583

Inventors:
Berkeley, Reed George
Publication Date:
08/08/1933
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Assignee:
METROPOLITAN DEVICE CORP
Primary Class:
182/68.100
Other Classes:
182/121, 182/106, 182/131, 182/123
International Classes:
E06C5/04; E06C7/16; E06C7/18; E06C5/00; E06C7/00