Title:
Ladder platform
United States Patent 1553279
Inventors:
John, Wirth
Publication Date:
09/08/1925
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Assignee:
John, Wirth
Primary Class:
Other Classes:
182/229, 182/123, 248/238, 182/130
International Classes:
E06C7/16; E06C7/48; E06C7/00