Method of reenforcing thin-walled metal articles
United States Patent 1886396

Inventors:
Adolf, Hainlen
Publication Date:
11/08/1932
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Assignee:
Adolf, Hainlen
Primary Class:
164/76.100
Other Classes:
220/626, 72/347, 164/112
International Classes:
B21D53/00; B22D19/02