Fujitsu Ltd. said Wednesday it has sued subsidiaries of Samsung Electronics Co. of South Korea in Japanese and U.S. courts for infringing on its patents for plasma display panels.

Fujitsu said it filed a suit Tuesday with the Tokyo District Court against Samsung Japan Corp., seeking an injunction against the import and sale of the plasma displays in Japan.

The company also filed a lawsuit with the U.S. Federal District Court in Los Angeles against Samsung SDI Co., seeking damages for patent infringement as well as a court order to halt the import and sale of those products.