Title:
Fire alarm system using a plural oscillator radio transmitter
United States Patent 2989621
Inventors:
Barton, Paul M.
Emmett, Jennings JO.
Application Number:
US61107956A
Publication Date:
06/20/1961
Filing Date:
09/20/1956
Assignee:
JENNINGS RADIO MFG CORP
Primary Class:
Other Classes:
331/37, 331/42, 331/47, 331/164, 332/122, 340/287, 343/719, 455/40
International Classes:
G08B25/10; H04B13/02
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