Device for detecting termination of connection to a programme to be paid for, received by a subscriber unit via an interactive remote distribution network
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Nov 30, 1993
Grant Date -
N/A
app pub date -
Nov 16, 1990
filing date -
Mar 21, 1989
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
The device of the invention comprises, in the terminal (7) of each subscriber, a carrier wave generator which sends this wave to a distribution center (1) as long as the television of this terminal is operating, the absence of this wave being detected in the center by a circuit (4) which then sends a shadow channel to the subscriber. The deflecting of the subscriber's television to a source independent of the center can be done only after the sending of a shadow channel to this subscriber.
First Claim
Family
International Classification(s)
Cited Art Landscape
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