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:
Feb. 16, 2021
Filed:
Jun. 03, 2019
Lexmark International, Inc., Lexington, KY (US);
William Pohl Corbett, Lexington, KY (US);
Gary Allen Denton, Lexington, KY (US);
James Paul Drummond, Georgetown, KY (US);
Keith Bryan Hardin, Lexington, KY (US);
Kelly Ann Killeen, Lexington, KY (US);
Randal Scott Williamson, Georgetown, KY (US);
LEXMARK INTERNATIONAL, INC., Lexington, KY (US);
Abstract
A system for use in authentication processes is described comprising a physical unclonable function ('PUF'), a substrate, a plurality of magnetized particles randomly dispersed in the substrate, a PUF reader constructed using multiple discrete magnetometer chips that have magnetic field sensors, placed on a circuit card in an array with a sufficient center to center spacing between sensing elements of adjacent magnetometer chips, wherein the PUF reader measures the magnetic field data at multiple locations in close proximity to the magnetized particles. The measured magnetic field data may be compared to previously enrolled data to assess authenticity.