Passive device shield with proximity change alert
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United States of America Patent
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Jan 1, 2019
Grant Date -
N/A
app pub date -
Feb 2, 2017
filing date -
Feb 2, 2017
priority date (Note) -
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status (Latency Note)
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Abstract
A passive device shield 2 used to protect a passive chip containing data embedded in a device from remote skimming at a frequency which activates the chip to send the data, the shield 2 being removable to enable authorized reading of the chip data. The shield 2 is adapted to block the frequencies which activate the chip, the shield 2 further having a transmitter 18 which sends a coupling signal at a non-blocked frequency to a receiver 20, at least one of the receiver/and transmitter 18 having means to monitor the distance between the transmitter 18 and receiver 20 and an alert means to indicate when a predetermined distance has been exceeded.
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