Communications: electrical – Condition responsive indicating system – Specific condition
Reexamination Certificate
2006-07-11
2006-07-11
Lieu, Julie Bichngoc (Department: 2636)
Communications: electrical
Condition responsive indicating system
Specific condition
C340S572100, C340S572200, C340S572500, C340S551000, C340S552000
Reexamination Certificate
active
07075440
ABSTRACT:
A miniature magnetic article surveillance system marker is adapted, when armed, to resonate at a frequency provided by an incident magnetic field applied within an interrogation zone. The marker comprises a magnetomechanical element having at least one elongated ductile strip of magnetostrictive ferromagnetic material disposed adjacent to a ferromagnetic element which, upon being magnetized, magnetically biases the strip and arms it to resonate at said frequency. A substantial change in effective magnetic permeability of the marker at the resonant frequency provides the marker with signal identity.
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Anderson, III Philip M.
Fabian Carl E.
Fish Gordon E.
Buff Ernest D.
Ernest D. Buff & Associates,LLC
Fish Gordon E.
Lieu Julie Bichngoc
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