Title:
Ladder seats
Document Type and Number:
United States Patent 2818310
Inventors:
Campbell, Thaddeus C.
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Publication Date:
12/31/1957
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Referenced by:
Export Citation:
Assignee:
BELL TELEPHONE LABOR INC
Primary Class:
International Classes:
A01D46/24; E06C7/16; A01D46/00; E06C7/00
US Patent References: