Magnetic marker and method for modifying the magnetic properties thereof
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United States of America Patent
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Oct 3, 1995
Grant Date -
N/A
app pub date -
Jun 5, 1992
filing date -
Oct 15, 1990
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A method of modifying the magnetic properties of a thin film of a magnetically active material is provided which comprises forming surface modulations on the material in order to partition it into regions which display at least some degree of mutual magnetic independence. The resulting modified thin film may be used as a marker or tag in an anti-pilferage or article location system. The surface modulations formed on the material in the anti-pilferage or article location marker serve to enhance the response of the marker when used in an anti-pilferage or article location system.
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