Electric signaling system
United States Patent 2262838

Inventors:
Maurice, Deloraine Edmond
Harley, Reeves Alec
Publication Date:
11/18/1941
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Assignee:
INT STANDARD ELECTRIC CORP
Primary Class:
178/71.600
Other Classes:
331/166, 375/295, 178/71.800, 331/144, 331/173, 327/309, 333/5
International Classes:
H04J3/00; H04L27/00