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Reader and writer for an IC card

  • US 4,767,920 A
  • Filed: 05/16/1986
  • Issued: 08/30/1988
  • Est. Priority Date: 05/18/1985
  • Status: Expired due to Fees
First Claim
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1. An integrated circuit (IC) card reader and writer for transferring data between a host computer and an IC card inserted in the IC card reader and writer, said IC card containing memory means for storing data indicating a write-in voltage level to be used in the transfer of data to said IC card, comprising:

  • means for determining the write-in voltage level of the IC card inserted in said reader and writer from said data stored in said memory means; and

    power supply means for providing a write-in voltage corresponding to the voltage level determined by said means for determining.

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