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Information providing systems and portable electronic devices

  • US 5,701,580 A
  • Filed: 12/01/1995
  • Issued: 12/23/1997
  • Est. Priority Date: 12/09/1994
  • Status: Expired due to Term
First Claim
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1. An information providing system using a radio network, comprising:

  • a service center including;

    means for providing respective outline items of information in a first transmission and respective detail items of information in a second transmission; and

    means for attaching to each of said outline items of information and each of said detail items a corresponding key code; and

    at least one terminal including;

    selection means for enabling a user to select a desired outline item of information from among the outline items of information provided in the first transmission;

    storage means for storing the key code attached to the outline item of information selected by the selection means;

    comparison means for comparing the key code stored in said storage means with a respective one of the key codes attached to the detail items of information provided in the second transmission; and

    reception means for accepting the detail item of information whose compared key code is found to match with the key code stored in said storage means.

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