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Information retrieval system

  • US 7,050,790 B2
  • Filed: 07/27/2001
  • Issued: 05/23/2006
  • Est. Priority Date: 07/27/2000
  • Status: Active Grant
First Claim
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1. An information retrieval system comprising:

  • a server to transmit audio and/or visual information that changes as time elapses in a limited space, and transmit relevant information in synchronism with the transmitted audio and/or visual information that changes as time elapses, the relevant information being related to and changing as time elapses in synchronism with the transmitted audio and/or visual information that changes as time elapses; and

    a hand-held device capable of communication with the server in a communications area covered by the server, the hand-held device establishing communication with the server via specific communication means when the hand-held device is located in the communications area, and receiving the transmitted relevant information while the communication between the hand-held device and the server is being established;

    wherein the hand-held device is capable of having access to an information source different from the server, in order to gain a detailed information about the audio and/or visual information based on the received relevant information.

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