发明名称 |
ARTICLE THEFT DETECTION |
摘要 |
<p>An electronic article theft detection system which accurately senses the presence of a target on a protected article by sensing electromagnetic disturbances at a plurality of frequences, comparing their relative amplitudes and producing a detection signal when the compared relative amplitudes correspond to those produced by the presence of a target.</p> |
申请公布号 |
CA1169136(A) |
申请公布日期 |
1984.06.12 |
申请号 |
CA19810379504 |
申请日期 |
1981.06.10 |
申请人 |
KNOGO CORPORATION |
发明人 |
COOPER, MICHAEL N.;POKALSKY, PETER A. |
分类号 |
G01V3/00;G01V3/10;G01V15/00;G08B13/24;(IPC1-7):G08B13/24 |
主分类号 |
G01V3/00 |
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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