Apparatus for forming sheet metal material
United States Patent 2606516
US Patent References:
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Inventors:
Raynes, Burt F.
Publication Date:
08/12/1952
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Assignee:
HARBOR AIRCRAFT CORP
Primary Class:
72/57
Other Classes:
72/398
International Classes:
B21D22/10; B21D22/00
US Patent References:
0977639
1934292Process and machine for threading the necks of tubes
2190664Knitting machine
2377664Sheet metal shaping and shearing
Foreign References:
GB604472A