Title:
Test device for printed papers and elements of same
United States Patent 2957387

Inventors:
Patzer, William A.
Publication Date:
10/25/1960
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Assignee:
Seth, Atwood B.
Primary Class:
356/432
Other Classes:
356/72, 356/71, 194/207, 209/534, 101/407.100
International Classes:
G07D7/00