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:
Jun. 01, 1999
Filed:
Sep. 29, 1997
Applicant:
Inventor:
Manfred Ruhrig, Weinheim, DE;
Assignee:
Esselte Meto International GmbH, Heppenheim, DE;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G08B / ;
U.S. Cl.
CPC ...
3405721 ; 3405723 ; 3405726 ;
Abstract
The present invention is directed to a security element for electronic article surveillance in an electromagnetic surveillance system, comprising a soft magnetic, magnetostrictive strip and a premagnetization element fabricated from a semi-hard or hard magnetic material that is associated with the strip, and to a method of manufacturing such security elements. With regard to the security element the premagnetization element is configured such that, by application of an essentially constant external field (H), it produces a stray field that optimizes the magneto-elastic properties of the stripe.