Ericsson said it filed a complaint with the U.S. International Trade Commission (ITC) requesting an exclusion order against Apple's products for infringing Ericsson patents that are essential to the 2G and 4G/LTE standards.
It also filed a second ITC complaint seeking an exclusion order and multiple complaints in the United States District Court for the Eastern District of Texas requesting damages and injunctions for infringement of patents "critical to many other aspects of Apple's devices".
Gustav Brismark, head of patent strategy at Ericsson, said that Apple's previous license agreement with Ericsson had expired around mid-January.
Ericsson filed a complaint in mid-January against Apple over mobile technology license payments, responding to a lawsuit from the iPhone maker.
Apple filed its suit on Jan. 12, alleging the LTE wireless technology patents were not essential to industry cellular standards and that Ericsson was demanding excessive royalties.