By Ben James

Law360, New York (October 04, 2006, 12:00 AM ET) -- Rolls-Royce Corp. has filed a federal trademark suit claiming a helicopter repair company stole its trade secrets, just days after the same company filed a lawsuit against Rolls-Royce alleging tortious interference and violations of the Sherman Act.

Rolls-Royce's lawsuit, filed in district court in Indianapolis on Monday, levels charges including unfair competition in violation of the Lanham Act, misappropriation of trade secrets, unjust enrichment and theft.

While the complaint claims that Mo.-based AvidAir Helicopter Supply Inc.’s misconduct constitutes “theft” under Indiana common law, the attorney who...