Remote control by plural concurrent diverse type signals
United States Patent 3183509
US Patent References:
Electrical controlling apparatus
- - 1721216
Sound and light wave apparatus
- - 1934859
Communication system
- - 2186252
Frequency responsive relay
- - 2194559
Arrangement for mixing two frequencies in a superheterodyne receiver
- - 2206072
Electrical controlling apparatus
- - 1721216
Sound and light wave apparatus
- - 1934859
Communication system
- - 2186252
Frequency responsive relay
- - 2194559
Arrangement for mixing two frequencies in a superheterodyne receiver
- - 2206072
Inventors:
Alexander, Ellett
Publication Date:
05/11/1965
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Export Citation:
Assignee:
ZENITH RADIO CORP
Primary Class:
Other Classes:
331/116R, 116/DIG.030, 116/137R, 331/117R, 116/137A, 367/197, 361/182
International Classes:
G08C23/02; G08C23/00
US Patent References: