ALEXANDRIA, Va., Sept. 10 -- United States Patent no. 12,412,456, issued on Sept. 9, was assigned to IGT (Las Vegas).

"Wagering game play feature with rotating matrix of game symbols" was invented by Nathan Ajhar (Sparks, Nev.), Lauren Hillstrom (Reno, Nev.), Nicholas Hillstrom (Reno, Nev.) and Yu Chong (Reno, Nev.).

According to the abstract* released by the U.S. Patent & Trademark Office: "A wagering game includes an array of N first game symbols and a matrix of second game symbols in a first rotational position, each first game symbol corresponding to a respective row of N second game symbols. For each row of second game symbols, based on a determination that none of the second game symbols in the row have a higher value than the corre...