Method and apparatus for heat treating
United States Patent 1923145

Inventors:
Harsch, John W.
Publication Date:
08/22/1933
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Assignee:
LEEDS & NORTHRUP CO
Primary Class:
432/12
Other Classes:
432/25, 34/191, 432/32, 432/9, 148/238, 148/215, 432/199, 432/52, 148/511, 148/206, 432/21, 432/48, 148/559
International Classes:
C21D9/663; C21D9/54