ALEXANDRIA, Va., Feb. 19 -- United States Patent no. 12,229,390, issued on Feb. 18, was assigned to University of Southern California (Los Angeles).

"Detecting keyboard accessibility issues in web applications" was invented by Paul Chiou (Los Angeles), Ali Alotaibi (Los Angeles) and William Halfond (Los Angeles).

According to the abstract* released by the U.S. Patent & Trademark Office: "A method for detecting and/or localizing keyboard accessibility failures (KAFs) in a web page is disclosed. A document object model of a web page is read. A keyboard navigation flow model is generated from the document object model of the web page based on interactions of a user with the web page. The model includes states representing user interfaces dis...