Communications: electrical – Condition responsive indicating system – With particular coupling link
Reexamination Certificate
2007-05-01
2010-10-12
Goins, Davetta W (Department: 2612)
Communications: electrical
Condition responsive indicating system
With particular coupling link
C340S539100, C340S539230, C340S010100, C340S010400
Reexamination Certificate
active
07812719
ABSTRACT:
A radio frequency identification (RFID) system and method for tracking and locating an RFID tag is disclosed. The system includes a reader, an identification tag, at least one sensor-tag and a data processing element. The reader is used to initiate a query for an object with an RFID tag. The identification tag is attached to the object. The RFID tag responds to the query. At least one sensor-tag is positioned near the RFID tag. The at least one sensor-tag functions to receive the response of the RFID tag. The sensor-tag determines whether the identification tag is within a predetermined sensor-tag range. Based upon this determination, the at least one sensor-tag communicates a response signal to the reader when the at least one sensor-tag receives a predetermined request signal from the reader. Based on the responses of the sensor-tags, the location of the object with the responding RFID tag can be calculated.
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Athalve Akshay
Djuric Petar M.
Goins Davetta W
Lau Hoi C
Scully , Scott, Murphy & Presser, P.C.
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