ALEXANDRIA, Va., Sept. 10 -- United States Patent no. 12,412,444, issued on Sept. 9, was assigned to IGT (Las Vegas).

"Symbol display accumulation sequence and a related accumulated symbol display use sequence" was invented by David Jenkins (Grants Pass, Ore.), Dwayne Nelson (Las Vegas), Christopher John Richardson (Reno, Nev.) and Jacqueline Diane Alvarez (Las Vegas).

According to the abstract* released by the U.S. Patent & Trademark Office: "Gaming systems and methods that provide a symbol display accumulation sequence and a related accumulated symbol display use sequence, wherein the accumulation sequence includes an accumulation of symbol displays during one or more plays of one or more games during, and wherein the use sequence inclu...