Method of and apparatus for heattreating
United States Patent 1949716

Inventors:
Harsch, John W.
Publication Date:
03/06/1934
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Assignee:
LEEDS & NORTHRUP CO
Primary Class:
432/18
Other Classes:
432/152, 432/148, 432/49, 432/31, 432/128, 266/252, 34/223, 432/21
International Classes:
C21D9/00