RF reactivatable marker for electronic article surveillance system
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United States of America Patent
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-
May 17, 1988
Grant Date -
N/A
app pub date -
Sep 9, 1985
filing date -
Sep 9, 1985
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A marker for use in radio frequency electronic article surveillance systems where the marker contains an inductive-capacitive resonant circuit and is made reversibly deactivatable and reactivatable by the addition of a piece of magnetic material and means, such as a piece of permanently magnetizable material, for biasing the first material to prevent alternating fields induced therein from changing the magnetic state of that material, thereby preventing hysteresis losses from causing a lowering of the Q of the resonant circuit below the point of detection.
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Cited Art Landscape
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