Title:
NONINTERFERING ELECTRICAL SIGNALING SYSTEM
United States Patent 3500377


Inventors:
Muehter, Manfred W.
Application Number:
US3500377DA
Publication Date:
03/10/1970
Filing Date:
10/21/1966
Assignee:
AMERICAN DISTRICT TELEGRAPH CO
Primary Class:
Other Classes:
340/292, 340/295
International Classes:
G08B25/00; (IPC1-7): G08B25/00
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