Title:
Method and apparatus for shaping sheet-metal articles
Document Type and Number:
United States Patent 1749913
Inventors:
John, Groehn Otto
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Publication Date:
03/11/1930
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Referenced by:
Export Citation:
Assignee:
HUDSON MOTOR CAR CO
Primary Class:
Other Classes:
72/400
International Classes:
B21D5/02; B21D53/00