METHOD OF FORMING SHEET OR PLATE MATERIAL
United States Patent 3529458

Inventors:
Butler, Roger David
Bowers, Ian Frederick
Colley, Cedric Charles Edward
Publication Date:
09/22/1970
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Assignee:
PRESSED STEEL FISHER LTD
Primary Class:
72/60
Other Classes:
72/364, 425/384, 425/144, 72/344, 425/387.100, 425/437
International Classes:
B21D26/02; B21D26/00; B21D26/04




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