ALEXANDRIA, Va., Sept. 10 -- United States Patent no. 12,412,442, issued on Sept. 9, was assigned to Aristocrat Technologies Inc. (Las Vegas).

"Upgradeable symbol feature systems and methods for a gaming environment" was invented by Bradley Hendricks (Las Vegas) and Allon Englman (Las Vegas).

According to the abstract* released by the U.S. Patent & Trademark Office: "A gaming device is provided. The gaming device may be configured to, determine that at least a first base prize symbol is displayed in a first matrix position of a matrix of a game display, the first base prize symbol being associated with a first prize amount, cause the game display to display, in the first matrix position, a first transparent prize symbol, the first transpa...