发明名称 |
DEACTIVATABLE/REACTIVATABLE MAGNETIC MARKER HAVING A STEP CHANGE IN MAGNETIC FLUX |
摘要 |
A marker for use in an electronic article surveillance 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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申请公布号 |
CA2093938(C) |
申请公布日期 |
1997.03.04 |
申请号 |
CA19932093938 |
申请日期 |
1993.04.13 |
申请人 |
SENSORMATIC ELECTRONICS CORPORATION |
发明人 |
HO, WING K.;YAMASAKI, JIRO |
分类号 |
G01V3/08;G01V3/00;G01V3/10;G01V15/00;G08B13/24;G09F3/00;H01F1/00;H01F1/12;(IPC1-7):G08B13/24 |
主分类号 |
G01V3/08 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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