Title:
Apparatus for dimpling sheet metal stock
Document Type and Number:
United States Patent 2453762
Inventors:
Schwartz, Arthur A.
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Publication Date:
11/16/1948
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Referenced by:
Export Citation:
Assignee:
BELL AIRCRAFT CORP
Primary Class:
Other Classes:
72/359
International Classes:
B21D22/04; B21D22/00
US Patent References:
Foreign References:
| GB511106A |