04025851 is referenced by 391 patents and cites 5 patents.

A system for automatically monitoring the programs broadcast by network affiliated broadcasting stations includes a plurality of remote monitoring sites and a central office for periodically interrogating the remote monitoring sites. Each remote monitoring site contains apparatus for monitoring time varying program identifying data, and for storing the data in a change format when the time varying data changes in an unexpected manner. An elapsed time clock in each remote monitoring unit generates a record of the elapsed time between the unexpected changes.

Each remote unit includes a minicomputer having a read-only memory and a random-access memory. The data in the read-only memory serves to establish communications with the central office and permits the central office to access the random-access memory. After the random-access memory has been accessed, it may be reprogrammed to alter the operation of the remote monitoring unit to accommodate different data formats or different information.

Title
Automatic monitor for programs broadcast
Application Number
5/636041
Publication Number
4025851
Application Date
November 28, 1975
Publication Date
May 24, 1977
Inventor
Carl M Solar
Largo
FL, US
Donald E Haselwood
Clearwater
FL, US
Assignee
A C Nielsen Company
IL, US
IPC
H04J 9/00
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