Device to monitor the content and/or duration of the display of

Details Device to monitor the content and/or duration of the display of Device to monitor the content and/or duration of the display of

1988-09-20

1990-04-10

George, Keith E.

Telephonic communications

Telephone line or system combined with diverse electrical...

Having transmission of a digital message signal over a...

379144, H04M 1100, H04M 1700

Patent

active

049167316

ABSTRACT:
The period for which advertisements are displayed on display screens is monitored by coupling the displaying time with the time of a telephone call from a public telephone booth near the display panel. Preferably, the call made from this booth is paid with a pre-payment memory card. This memory card also has a memorizing zone in which it is possible to record an advertisement which is precisely the advertisement to be displayed.

REFERENCES:
patent: 4367402 (1983-01-01), Giraud et al.
patent: 4797914 (1989-01-01), Vaello
Weinstein, Stephen B., "Smart Credit Cards: The Answer to Cashless Shopping", IEEE Spectrum, 2/84.

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