Magnetic marker
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United States of America Patent
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-
Sep 16, 1980
Grant Date -
N/A
app pub date -
Sep 18, 1978
filing date -
Sep 18, 1978
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
The present invention relates to an improved magnetic marker and method for manufacturing same. The marker includes a ribbon of magnetic signal material of relatively low coercivity having coupled thereto at least two control elements of a ferro-magnetic material which may be permanently magnetized by a control signal in order to saturate the strip of first ferromagnetic material, thereby preventing the first ferromagnetic material from generating higher order harmonics when interrogated by a periodic magnetic signal of fundamental frequency.
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Cited Art Landscape
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