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United States Patent 1940294

Inventors:
Calkins, William G.
Publication Date:
12/19/1933
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Assignee:
CHRYSLER CORP
Primary Class:
75/243
Other Classes:
428/613, 29/DIG.031, 76/107.100, 75/231, 419/11
International Classes:
B21D37/20; C22C33/02