The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Mar. 25, 2008
Filed:
Nov. 01, 2002
Applicants:
William H. Ward, Costa Mesa, CA (US);
Timothy Jon Ward, Mira Loma, CA (US);
Inventors:
William H. Ward, Costa Mesa, CA (US);
Timothy Jon Ward, Mira Loma, CA (US);
Assignee:
Avid Identification Systems, Inc., Norco, CA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G06K 19/06 (2006.01); G08B 26/00 (2006.01); H04Q 5/22 (2006.01);
U.S. Cl.
CPC ...
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.