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公开(公告)号：AU638241B2
公开(公告)日：1993-06-24
申请号：AU5291690
申请日：1990-04-04
Applicant: SENSORMATIC ELECTRONICS CORPORATION
Inventor： MARCO A. PAEZ , HARRY E. WATKINS , CHRISTOPHER B. PLONSKY
Abstract: A magnetic article surveillance system in which surveillance is carried out by operating the system in first and second different modes of a magnetic transmitting and receiver means in order to make a determination as to the presence of an article in the zone.
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