Article theft detection

Details Article theft detection Article theft detection

G - Physics

08

B

340/72, 340/124.

G08B 13/24 (2006.01)

Patent

CA 1169136

- 44 - ABSTRACT An electronic article theft detection system which accurately senses the presence of a target on a protected article by sensing electromagnetic disturbances at a plurality of frequences, comparing their relative amplitudes and producing a detection signal when the compared relative amplitudes correspond to those produced by the presence of a target.

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