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:
Jul. 29, 2003
Filed:
Jul. 01, 2002
Applicant:
Inventors:
Kevin John Atkins, Swindon, GB;
Ian Macdonald Green, London, GB;
Assignee:
Thorn Secure Science Limited, Swindon, GB;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G06K 7/08 ; G07D 7/04 ; G11B 5/127 ; G01R 3/312 ;
U.S. Cl.
CPC ...
G06K 7/08 ; G07D 7/04 ; G11B 5/127 ; G01R 3/312 ;
Abstract
A device for reading an elongate magnetic data carrier attached to or embedded in an article, having an active read head adapted to have a lateral extent greater than the width of the data carrier, preferably four times greater, such that the magnetic field produced by the read head results in a signal from the data carrier which has an amplitude which varies by less than 50% for head to data carrier spacings of from 0 to 60 microns. A wide read head can also make the reading of data more reproducible when reading narrow tracks using swipe readers, where precise alignment is difficult to achieve.