Mitsubishi filed an antitrust lawsuit Thursday against General Electric Co., accusing the company of monopolizing part of the wind-turbine market and making "baseless" patent-infringement claims against Mitsubishi to gain a competitive edge.

The suit was filed in federal court in Arkansas, where Mitsubishi plans a $100 million wind turbine manufacturing plant. But the company said in its suit that GE's "improper conduct" is jeopardizing the plant's future because there is now little U.S. demand for Mitsubishi turbines.

"If GE is successful in its campaign to drive Mitsubishi out of the variable-speed wind turbine market, then our facility will have to sit idle," said Sonia Williams, counsel and spokeswoman for Mitsubishi. Construction on the plant is to begin in the fall and the plant is expected to build its first turbine in 2011.

Mitsubishi did not specify the damages it is seeking but said Thursday the amount would likely be more than $1 billion. The suit claims that GE's patents are invalid and that the company filed "sham lawsuits" as a marketing tool against Mitsubishi.