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Electronic transaction card

  • US 7,581,678 B2
  • Filed: 02/22/2005
  • Issued: 09/01/2009
  • Est. Priority Date: 02/22/2005
  • Status: Active Grant
First Claim
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1. An apparatus comprising:

  • a stripe to communicate with a magnetic card reader; and

    a memory card interface to communicate with an intelligent electronic device, the memory card interface being compatible with an add-on slot in an intelligent electronic device;

    wherein the apparatus has dimensions smaller than a credit card, and wherein the stripe includes circuitry to produce at least one time-varying magnetic field.

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