Title:
Method and apparatus for producing bulged shapes
United States Patent 3405546

Inventors:
Hoffman, Bernard L.
Reed, Lincoln C.
Publication Date:
10/15/1968
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Assignee:
Krause, Ass F. A.
Primary Class:
72/348
Other Classes:
413/69
International Classes:
B21D22/02; B21D22/00
US Patent References:
3163142Die assembly
Foreign References:
GB186803831A




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