IGT Files Suit for Patent Infringement Against Aristocrat

LAS VEGAS, Nov. 15, 2010 /PRNewswire/ -- International Game Technology (NYSE: IGT) today announced the filing of a patent infringement lawsuit against Aristocrat Leisure Limited of Australia and its U.S. Affiliate Aristocrat Technologies, Inc., (collectively "Aristocrat") in connection with the sale and distribution of Aristocrat's gaming devices, including particularly Aristocrat's Viridian WS slot machines. The lawsuit comes after failed attempts to resolve the IP disputes between Aristocrat and IGT.

The lawsuit was filed in the U.S. District Court for the Central District of California. In the suit, IGT asserts that Aristocrat has willfully infringed and continues to infringe two patents directed to fundamental capabilities for authentication of gaming software:

1. U.S. Patent 6,620,047 entitled "Electronic Gaming Apparatus Having Authentication Data Sets"; and
2. U.S. Patent No. RE 39,370 entitled "Electronic Casino Gaming System with Improved Play Capacity, Authentication and Security."

"We filed this case because IGT's intellectual property is being knowingly and unfairly exploited by Aristocrat," said Robert C. Melendres, Chief Legal Officer and Corporate Secretary at IGT. "IGT is the world's leading innovator and creator of intellectual property in the gaming industry."

About IGT

International Game Technology (NYSE: IGT) is a global leader in the design, development, and manufacture of gaming machines and systems products, as well as online and mobile gaming solutions for regulated markets. More information about IGT is available at www.IGT.com.

SOURCE IGT

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