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:
Nov. 26, 2002
Filed:
Jul. 07, 2000
Applicant:
Inventors:
Peter J. Zarembo, Shoreview, MN (US);
Anthony M. Belka, Stillwater, MN (US);
Assignee:
3M Innovative Properties, St. Paul, MN (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G08B 1/314 ;
U.S. Cl.
CPC ...
G08B 1/314 ;
Abstract
A device is disclosed for activating and deactivating magnetic electronic article surveillance (EAS) markers, and particularly those EAS markers that are associated with magnetically recorded media. In one embodiment, the device includes control circuitry comprising a coil, such as a solenoid-type coil, that provides a substantially uniform magnetic field that reliably activates and deactivates the marker, yet doesn't damage the magnetically-recorded media.