Communications: electrical – Condition responsive indicating system – Specific condition
Reexamination Certificate
2007-01-30
2007-01-30
Tweel, Jr., John (Department: 2612)
Communications: electrical
Condition responsive indicating system
Specific condition
C340S870030, C342S042000
Reexamination Certificate
active
10931476
ABSTRACT:
An object location system and method is provided for locating objects. The system includes an RFID reader, an angle calculator, and a distance calculator to determine which of a plurality of zones an object is located in or passing through. An RFID tag is affixed with the object that is to be located. The RFID reader transmits signals to the RFID tag and receives backscatter-modulated signals from the RFID tag at one or more RFID antennas. From those received signals, the angle calculator determines an angle of position of the RFID tag relative to the RFID antenna. From the angle of position the zone in which the object is located is determined.
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Partial International Search PCT/US2005/030580 Apr. 24, 2006.
Bender James Joseph
Bridgelall Raj
Duron Mark William
Knadle, Jr. Richard T.
Knox Michael
Ingrassia Fisher & Lorenz P.C.
Symbol Technologies Inc.
Tweel , Jr. John
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