Recording device
United States Patent 1979208

Inventors:
Friden, Carl M. F.
Publication Date:
10/30/1934
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Assignee:
IBM
Primary Class:
101/316
Other Classes:
200/86R, 200/DIG.021, 346/82, 346/87, 101/DIG.030
International Classes:
G07C1/06; G07C1/00