Communications: electrical – Condition responsive indicating system – Specific condition
Patent
1995-03-30
1995-12-19
Peng, John K.
Communications: electrical
Condition responsive indicating system
Specific condition
340571, 340551, 34082534, 34082535, 359537, G08B 1314
Patent
active
054772192
ABSTRACT:
A composite marker providing electronic article surveillance (EAS), identification, and authentication. The marker preferably includes an EAS detection element which includes a low-coercive force, high-permeability ferromagnetic material, and an adjacent, remanently-magnetizable ferromagnetic material which, when magnetized, alters a characteristic response produced by the first material when in an interrogation zone of an associated EAS system, an intermediate layer containing UPC or similar optically-readable information and a substantially-transparent, optically-detectable security element overlying said intermediate layer and having means integrally associated therewith for thwarting counterfeiting or other unauthorized duplication.
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Marfori Walfredo M.
Zarembo Peter J.
Bartingale Kari H.
Griswold Gary L.
Kirn Walter N.
Lee Benjamin C.
Minnesota Mining and Manufacturing Company
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