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Battery built-in wireless ID card unit and ID verification unit

  • US 6,011,483 A
  • Filed: 01/31/1997
  • Issued: 01/04/2000
  • Est. Priority Date: 02/06/1996
  • Status: Expired due to Term
First Claim
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1. A battery built-in wireless ID card unit comprising:

  • a magnetic field detection section which generates an electromotive force from a received purely magnetic field to turn on a power switch of a built-in battery; and

    a control section which is capable of sending out an ID code after said power switch is turned on, and thereafter turning off said power switch.

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