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:
Apr. 18, 2023
Filed:
Dec. 02, 2021
Lexmark International, Inc., Lexington, KY (US);
Scott Richard Castle, Lexington, KY (US);
Gary Allen Denton, Lexington, KY (US);
Robert Henry Muyskens, Lexington, KY (US);
Samuel Leo Rhodus, Lexington, KY (US);
Lexmark International, Inc., Lexington, KY (US);
Abstract
The use of a magnetic particle based 'PUF' (Physically Unclonable Function) disk, when read by magnetic sensor(s), as a positional encoder is described. It is often necessary to include a linear or rotary encoder within a device for tracking motor movements, or to enable a closed-loop control algorithm on the motor system. These randomly dispersed magnetic particle disks can be used as a positional encoder, where the speed of movement and the direction of movement may be monitored.