Manufacture of shoe stiffener material
United States Patent 2067239

Inventors:
Mayo, Winthrop M.
Lovell, Stanley P.
Publication Date:
01/12/1937
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Assignee:
BECKWITH MFG COMPANY
Primary Class:
36/68
Other Classes:
427/203, 428/96, 12/146D, 36/77M
International Classes:
A43B23/08; A43B23/00