ALEXANDRIA, Va., Oct. 21 -- United States Patent no. 12,770,473, issued on Oct. 20, was assigned to IGT (Las Vegas).

"Tracking quantities of winning symbols for triggering additional symbol evaluations" was invented by Chris Peterson (Reno, Nev.).

According to the abstract* released by the U.S. Patent & Trademark Office: "Gaming systems and methods that track quantities of one or more tracked symbols that are part of winning symbol combinations in one or more plays of a game, and trigger one or more additional symbol evaluations responsive to one or more of the tracked quantities of such tracked symbols reaching one or more threshold quantities."

The patent was filed on July 16, 2024, under Application No. 18/774,481.

*For further infor...