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Apparatus for prevention of reading of magnetic cards

  • US 8,517,268 B2
  • Filed: 03/08/2005
  • Issued: 08/27/2013
  • Est. Priority Date: 06/24/2004
  • Status: Expired due to Fees
First Claim
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1. A card reading machine comprising:

  • a card reader for reading data on a magnetic card; and

    a device for preventing reading of the data on the magnetic card by an illegal card reading devices operatively associated with the card reading machine,wherein the device for preventing reading comprises a coil for generating signals when the magnetic card is passed along the illegal card reading device, the signals being so similar in frequency range to signals generated by the magnetic card being passed along the illegal card reading device, that coil generated signals and signals generated by the magnetic card being passed along the illegal card reading device create combined signals from which the coil generated and the passing of the magnetic card generated signals cannot in practice be filtered from each other.

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