Patent 8192275 was granted and assigned to WMS Gaming on June, 2012 by the United States Patent and Trademark Office.
A gaming system comprising an input device for receiving a wager to play a wagering game. The gaming system also includes a display for displaying an array of symbols that indicate a randomly selected outcome of the wagering game. In response to the randomly selected outcome including a winning symbol combination, at least one symbol that is not a part of the winning symbol combination is removed from the array and causes other symbols to move into a position of the array vacated by the at least one removed symbol.