Survey of radio audience
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Jan 5, 1988
Grant Date -
N/A
app pub date -
May 12, 1986
filing date -
May 12, 1986
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A technique for surveying an audience. A portable signal detector unit picks up audible sounds reproduced by a radio set from signals transmitted by a given radio station. Among the broadcast signals is one unique to that particular station. The unit includes means capable of identifying that signal to automatically electronically record the fact that the station is being listened to by the carrier of the unit.
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Family
International Classification(s)
Cited Art Landscape
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