A federal judge has denied a request by International Game Technology for a restraining order against Shuffle Master in connection with a mathematical formula in use in a new Shuffle Master slot machine.
IGT alleges in a lawsuit filed in U.S. District Court for the District of Minnesota that Shuffle Master's use of its template algorithm in the new Double Platinum game infringes on IGT's Telnaes patent.
Telnaes technology vastly increases the number of possible outcomes on three- and four-reel slot machines.
Double Platinum is currently in field trials at the Excalibur resort on the Las Vegas Strip.
Shuffle Master CEO Joseph Lahti said in a statement released Friday that the judge's decision allows Shuffle Master to continue the field trials.