Waukegan-based slot machine maker WMS Industries Inc. said its gaming unit filed a patent infringement lawsuit against a unit of smaller rival Bally Technologies Inc., seeking injunctive relief and unspecified damages.
Several of Bally Gaming’s products, including its Cash Spin product, infringe WMS patents covering WMS’ Transmissive Reels gaming concept and technology, WMS said in a statement.
Slot machine sales, hit badly by the recession, have not yet recovered as casinos continue to spend sparingly due to less customer spending on gambling.
Shares of WMS closed at $40.41 Tuesday on the New York Stock Exchange. Bally shares closed at $34.31.
WMS shares, largely flat this year, have outperformed Bally shares that shed about 17 percent over the same time.
The case was filed in the U.S. District Court for the Northern District of Illinois, Eastern Division in Chicago.
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