Marker for remote detection of articles

Details Marker for remote detection of articles Marker for remote detection of articles

2006-07-11

2006-07-11

Goins, Davetta W. (Department: 2632)

Communications: electrical

Condition responsive indicating system

Specific condition

C340S551000, C340S572100, C340S572200, C340S572600, C340S572900, C073S579000

Reexamination Certificate

active

07075439

ABSTRACT:
A marker for remote detection of articles has an elongated sensor element with magnetic and electric properties. The elongated sensor element provides an electromagnetic reply signal when receiving an electromagnetic input signal. The elongated sensor element modulates the electromagnetic reply signal in response to an external magnetic modulating field. The marker also has means positioned in a vicinity of the elongated sensor element in the marker. The means is adapted to influence either the magnetic or the electric properties of the elongated sensor element in response to incident electromagnetic or magnetic energy, so that either the electromagnetic reply signal itself or the modulation thereof is substantially changed from an active state to a deactivated state.

REFERENCES:
patent: 3754226 (1973-08-01), Fearon
patent: 5867098 (1999-02-01), Angel et al.
patent: 6177870 (2001-01-01), Lian et al.
patent: 6229444 (2001-05-01), Endo et al.
patent: 6373387 (2002-04-01), Qiu et al.
patent: 6688162 (2004-02-01), Bachas et al.

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