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:
Mar. 28, 2023
Filed:
Sep. 29, 2021
Entrust Corporation, Shakopee, MN (US);
Rajesh Juriasingani, Shakopee, MN (US);
Justin Engelking, Shakopee, MN (US);
Entrust Corporation, Shakopee, MN (US);
Abstract
Techniques for scrambling residual images left behind on print ribbons due to printing on plastic cards or passports. A string of characters to be printed onto a plastic card is divided into character subsets. Metadata is assigned to each character subset, with the metadata defining the print sequence and location on the plastic card of each character subset. The character subsets are then printed on the plastic card in the sequence and the locations determined by the metadata. The sequence of characters in a residual image left on the print ribbon after printing of the character string differs from the sequence of the characters in the character string printed on the plastic card or passport.