05574431 is referenced by 306 patents and cites 15 patents.

A security tag used with an electronic article surveillance system for detecting the presence of the tag within a surveilled area utilizing electromagnetic energy at a frequency within a predetermined detection frequency range includes a dielectric substrate having first and second opposing principle surfaces and a resonant circuit capable of resonating at a frequency within the predetermined detection frequency range. The resonant circuit includes an inductor formed at least in part on one of the principal surfaces of the substrate. A first perforation path formed of a series of spaced apart perforations extends along a line across the substrate and through at least a portion of the inductor such that a stress exerted on the tag breaks the tag and the inductor along the first perforation path, causing an open circuit condition which prevents the resonant circuit from resonating.

In use, the security tag is affixed to an article and the stress applied to the article is a result of normal or ordinary use of the article.

Title
Deactivateable security tag
Application Number
8/521084
Publication Number
5574431
Application Date
August 29, 1995
Publication Date
November 12, 1996
Inventor
Gary T Mazoki
Sewell
NJ, US
Thomas J McKeown
Pensauken
NJ, US
Agent
Pantich Schwarze Jacobs & Nadel P C
Assignee
Checkpoint Systems
NJ, US
IPC
G08B 13/14
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