POSITIONING DEVICE FOR ELEVATED STRUCTURES
United States Patent 3537545

Inventors:
Willis, James E.
Leggett, Refford L.
Publication Date:
11/03/1970
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Assignee:
James, Willis E.
Refford, Leggett L.
Primary Class:
182/14
Other Classes:
182/142
International Classes:
E04G3/32; E04G3/34; E04G3/28; E04G3/10




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