Title:
Method of modifying internal strains in metal objects
United States Patent 1891234

Inventors:
Langenberg, Frederick C.
Publication Date:
12/20/1932
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Assignee:
US PIPE & FOUNDRY COMPANY
Primary Class:
100/75
Other Classes:
76/115, 29/424, 29/527.500, 72/362, 29/421.100
International Classes:
C21D10/00