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US Patent 7347379 Dual antenna coil transponder system

Patent 7347379 was granted and assigned to Avid Identification Systems, Inc. on March, 2008 by the United States Patent and Trademark Office.

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Patent attributes

Current Assignee

Avid Identification Systems, Inc.

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Patent Jurisdiction

United States Patent and Trademark Office

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Patent Number

Patent Inventor Names

Timothy Jon Ward0

William H. Ward0

Date of Patent

March 25, 2008

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Patent Application Number

104993510

Date Filed

November 1, 2002

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Patent Citations Received

US Patent 11984917 Electronics for use in smart cards and other near field RF communications enabled systems

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US Patent 11786333 Signal tag detection components, devices, and systems

US Patent 12132468 Method for sensing environmental conditions

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US Patent 12073272 Generating a response by a radio frequency identification (RFID) tag within a field strength shell of interest

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US Patent 11666391 Exciter assemblies

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Patent Primary Examiner

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Patent abstract

The present invention relates to a dual antenna coil identification system, and more particularly, to an interrogator or reader for inductively coupling to a transponder and thereby extract data from the transponder. The magnetic field required to energize a transponder is generated by currents flowing through two essentially identical but opposite phased antenna coils arranged near the area where tags are to be read.

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