Anti-theft detection system

Details Anti-theft detection system Anti-theft detection system

1997-10-22

1999-11-23

Wu, Daniel J.

Communications: electrical

Condition responsive indicating system

Specific condition

3405722, 3405724, 3405727, 3405728, 340571, 3405681, G08B 1314

Patent

active

059907916

ABSTRACT:
An anti-theft detection system. A target comprising a frequency multiplier is affixed to goods in a retail store. A low power radio frequency source is placed near the exits to the retail store, and the target emits harmonics of the frequency transmitted by the radio frequency source when located near the radio frequency source. A detector also located near the exits to the retail store detects the harmonics and commands an alarm, thereby allowing for an apprehension of shoplifters.

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