Multi-mode electronic article surveillance system

Details Multi-mode electronic article surveillance system Multi-mode electronic article surveillance system

1989-07-24

1991-09-17

Swann, III, Glen R.

Communications: electrical

Condition responsive indicating system

Specific condition

340572, 455 78, G08B 1324

Patent

active

050498576

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.

REFERENCES:
patent: 3859624 (1975-01-01), Kriofsky et al.
patent: 4779076 (1988-10-01), Weaver
patent: 4791412 (1988-12-01), Brooks
patent: 4797659 (1989-01-01), Larsen

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