Title:
Extensible plank
Document Type and Number:
United States Patent 1774268
Inventors:
Chauncy, Harding
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Publication Date:
08/26/1930
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Referenced by:
Export Citation:
Assignee:
Cephas, Eastman W.
Primary Class:
Other Classes:
108/65
International Classes:
E04G1/15; E04G1/00