Television selection system
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Oct 8, 1991
Grant Date -
N/A
app pub date -
Sep 11, 1989
filing date -
Sep 11, 1989
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A system connectable into standard television receiver systems for converting predetermined channels thereof to audio only channels and detecting selection of the predetermined channels to cause blanking of the picture tube at individual receivers in the system. The antenna or cable input is altered by supplying a carrier with audio, code and horizontal sync information at a frequency corresponding to that of an unused channel. A tone decoder is responsive to the code and horizontal sync information to cause blanking of the display while the audio information is reproduced in normal manner.
First Claim
Family
International Classification(s)
Cited Art Landscape
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