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:
May. 26, 1998
Filed:
Sep. 09, 1996
Applicant:
Inventors:
Giselher Herzer, Bruchkoebel, DE;
Gerd Rauscher, Alzenau, DE;
Assignee:
Vacuumschmelze GmbH, Hanau, DE;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G08B / ;
U.S. Cl.
CPC ...
340572 ; 340551 ; 148108 ; 148304 ;
Abstract
For security against theft or for identification of products using an electronic alternating field in an interrogation zone, a pulse generator, upon magnetic reversal due to a Barkhausen jump, exhibits an impulse behavior that produces characteristic harmonics and largely prevents confusion with other magnetically soft materials in the interrogation zone. This pulse generator is formed of an amorphous strip or an amorphous wire with a cobalt content of at least 20 at-%, subjected to a heat treatment by a current flowing through the strip or wire, to produce a ratio of remanence induction to saturation induction of between 0.2 and 0.9.