A Texas company has sued Nintendo for alleged violations of a patent in making chips for use in its game consoles, Nintendo said on Friday.
Lonestar Inventions said in a June 7 complaint filed at a Texas district court that Nintendo's U.S. unit was infringing on one of its patents, the court's Web site showed.
The patent covers technology that boosts the performance of semiconductors.
Nintendo, maker of the popular Wii game console, is checking on the content of the suit, spokeman Ken Toyoda said.
Lonestar Inventions officials were not immediately available for comment.
Lonestar Inventions, a Texas-based semiconductor device company, has sued other companies over the same patent. It sued Eastman Kodak
earlier this month, as well as Freescale Semiconductor and Agere Systems in January, according to court records.
Nintendo shares rose 0.5% to ¥42,100 in the morning, in line with the benchmark Nikkei average.