Patent 7594852 was granted and assigned to WMS Gaming on September, 2009 by the United States Patent and Trademark Office.
A slot machine comprises a housing, a plurality of physical symbol-bearing reels mounted in the housing, and a display arrangement positioned in front of the reels and interchangeable in the same housing between at least two of the following: (i) a display panel without an interior cavity, (ii) a light-guiding panel having an illuminated interior, and (iii) a transmissive video display.