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Survey technique for readership of publications

  • US 4,781,596 A
  • Filed: 06/16/1986
  • Issued: 11/01/1988
  • Est. Priority Date: 06/16/1986
  • Status: Expired due to Term
First Claim
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1. An electronic apparatus for monitoring a selected magazine as to its readership by individuals acting as test subjects involving a survey issue having a first unique code affixed to its front cover and a second unique code affixed to its back cover, comprising:

  • sensing means manipulable by the test subjects for detecting said first and second codes;

    first memory means for storing a reference code related to said first and second codes;

    means for comparing the detected first and second codes with said reference code to generate a control signal when a correspondence is found therebetween, respectively;

    second memory means for storing a data signal in response to generation of the control signal by said comparing means,time determining means coupled to the comparing means to determine the time difference between a time when a control signal is generated, respectively, for the first and second unique codes; and

    time threshold means for preventing the retention in the second memory means of said data signal when said determined time difference does not exceed a preset time threshold.

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