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Finger-print detection
United States Patent 2066535
Inventors:
Lucas, Francis F.
Publication Date:
01/05/1937
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Download PDF 2066535
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Assignee:
BELL TELEPHONE LABOR INC
Primary Class:
427/1
Other Classes:
427/157, 118/31.500, 250/302, 118/41
International Classes:
A61B5/117