Photoelectric coin registering device
United States Patent 2237132

Inventors:
Christensen, Andrew B.
Publication Date:
04/01/1941
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Assignee:
WURLITZER CO
Primary Class:
194/302
Other Classes:
377/7, 361/175, 250/214R, 235/32, 250/223R, 194/344
International Classes:
G07F5/10; G07F5/00