Detector system
United States Patent 2108202
Inventors:
Kelly Jr., Frederick G.
Publication Date:
02/15/1938
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Assignee:
AMERICAN TELETECTOR CORP
Primary Class:
Other Classes:
340/562, 331/177R, 331/65, 327/517, 40/463
International Classes:
G08B13/26; G08B13/22