Communications: electrical – Condition responsive indicating system – Specific condition
Reexamination Certificate
2007-09-11
2007-09-11
Tweel, Jr., John (Department: 2612)
Communications: electrical
Condition responsive indicating system
Specific condition
C340S572400
Reexamination Certificate
active
10807072
ABSTRACT:
Radio frequency identification (RFID) tags include compensating elements. The compensating elements enhance the operation of a compensated RFID tag, even when in close proximity to other RFID tags, whether the other tags are compensated or uncompensated. The compensating elements can include a closed loop of conductive material added to a RFID tag antenna. The conductive loop compensates the RFID tag performance when multiple RFID tags are in close proximity, keeping the frequency response of the assembled group of tags substantially centered near the operating frequency of the RFID system.
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Egbert William C.
Herdtle Thomas
3M Innovative Properties Company
Buss Melissa E.
Tweel , Jr. John
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