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System and method for transferring identification information between portable cards in a computerized retail store having communication among a plurality of computers

  • US 6,055,509 A
  • Filed: 02/11/1997
  • Issued: 04/25/2000
  • Est. Priority Date: 02/11/1997
  • Status: Expired due to Term
First Claim
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1. A method for a system including a plurality of first cards each having a first memory and respective first signal, a second card, a first computer that receives from the second card, and a store including a plurality of products, a central computer, and a checkout station having an electromagnetic detector and a checkout computer, the method comprising the step of:

  • sending a second signal to the first memory of a card in the plurality of first cards, the second signal corresponding to one of the plurality of products, and the following steps, performed in the store, of;

    communicating product data between the central computer and the checkout computer;

    receiving the first signal from the card in the plurality of first cards;

    sending the first signal to the second card;

    receiving, in the checkout computer, second signals from the card in the plurality of first cards;

    receiving a third signal from the electromagnetic detector, the third signal corresponding to a product in the store; and

    determining a price depending on whether the third signal corresponds to one of the received second signals.

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