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Electronic identification system

  • US 4,354,099 A
  • Filed: 06/20/1980
  • Issued: 10/12/1982
  • Est. Priority Date: 06/20/1980
  • Status: Expired due to Term
First Claim
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1. An electronic identification system, comprising:

  • (a) drive means for producing a first electromagnetic field at a first location, said drive means including a first electrical inductor about which said first electromagnetic field is induced in response to an applied current;

    (b) detector means for producing an output signal upon detection of a second electromagnetic field at a second location where said first electromagnetic field has a negligible effect upon said detector means, said detector means including a second electrical inductor in which said output signal is induced when said second electromagnetic field surrounds said second inductor; and

    ,(c) identifier means for sensing said first electromagnetic field and for producing said second electromagnetic field in response to sensing of said first electromagnetic field, said identifier means including a third electrical inductor and a fourth electrical inductor connected in series with said third electrical inductor, and said identifier means being physically separable from said drive means and from said detector means.

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