07170412 is referenced by 55 patents and cites 10 patents.

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.

Title
Angle of position object location system and method
Application Number
10/931476
Publication Number
7170412 (B2)
Application Date
August 31, 2004
Publication Date
January 30, 2007
Inventor
James Joseph Bender
Centereach
NY, US
Richard T Knadle Jr
Dix Hills
NY, US
Mark William Duron
East Patchogue
NY, US
Raj Bridgelall
Morgan Hill
CA, US
Michael Knox
Manhasset
NY, US
Agent
Ingrassia Fisher & Lorenz P C
Assignee
Symbol Technologies
NY, US
IPC
G08B 13/14
View Original Source