Barnes & Noble is asking the U.S. Department of Justice to investigate Microsoft's patent-licensing tactics, accusing the software giant of trying to thwart competition with flimsy infringement claims. "Microsoft is attempting to raise its rivals' costs in order to drive out competition and deter innovation in mobile devices," Barnes & Noble lawyer Peter T. Barbur wrote in an October 17 letter to Gene I. Kimmelman, the chief counsel for competition policy in the Justice Department's antitrust division.
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