ALEXANDRIA, Va., May 26 -- United States Patent no. 12,639,718, issued on May 26, was assigned to Visa International Service Association (San Francisco).

"Digital access code" was invented by Penny Jurss (Leander, Texas), Rowena McCallister (Evergreen, Colo.), Bradford Crouch (Highlands Ranch, Colo.) and Suresh Kalakrishnan (Cedar Park, Texas).

According to the abstract* released by the U.S. Patent & Trademark Office: "A method is disclosed. One embodiment of the invention is directed to a method. The method comprises: prompting, by an access device, a user to enter an access code; receiving, by the access device, the access code from the user; transmitting, by the access device, the access code to a validation computer, which validates t...