A report on Bloomberg today notes that Apple, Dell, and Sony have been added to a Bluetooth patent lawsuit. “The nonprofit Washington Research Foundation sued Matsushita Electric Industrial Co., Samsung Electronics Co. and Nokia Oyj over Bluetooth in Seattle federal court in December,” notes the story. “Apple, Dell and Sony were added as defendants March 15, along with Logitech International SA, Motorola Inc., Sony Ericsson Mobile Communications AB, Toshiba Corp. and Plantronics Inc., court papers show.