Method and means for making tube bends
United States Patent 1956604

Inventors:
Howard, Williams James
Publication Date:
05/01/1934
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Assignee:
GEN FIRE EXTINGUISHER CO
Primary Class:
72/206
Other Classes:
29/890.149, 72/394, 72/369, 29/890.053
International Classes:
B21D9/12; B21D9/00