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Security tags with a reversible optical indicator

  • US 6,752,837 B2
  • Filed: 06/28/2002
  • Issued: 06/22/2004
  • Est. Priority Date: 06/28/2002
  • Status: Expired due to Term
First Claim
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1. A reusable security tag reversibly operable in a first magnetic condition, to trigger a detector when the tag is within communication range of the detector, and a second magnetic condition, in which the detector is not triggered when the tag is within communication range of the detector, the tag including an optical indicator which has a first optical characteristic when the tag is in the first magnetic condition, and a second optical characteristic when the tag is in the second magnetic condition.

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