Deactivatable/reactivatable magnetic marker having a step...

Details Deactivatable/reactivatable magnetic marker having a step... Deactivatable/reactivatable magnetic marker having a step...

G - Physics

08

B

G08B 13/24 (2006.01) G01V 15/00 (2006.01) H01F 1/00 (2006.01)

Patent

CA 2093938

A marker for use in an electronic article surveil- lance system in which the marker comprises a magnetically soft component and exhibits a pinned wall hysteresis characteristic with a step change in flux at a threshold value of applied field and in which the marker further comprises a magnetically hard or semi-hard component integral with the soft component and whose magnetic state can be switched between activating and deactivating states to switch the marker between active and deactive states.

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