Mobile phone maker Nokia has filed a patent counter-suit against Qualcomm in a Texas court seeking damages and an injunction against the US chip maker.
Nokia said today it had filed a suit against Qualcomm accusing the US firm of infringing six implementation patents in its MediaFLO mobile TV technology and its Brew mobile data technology.
A legal dispute between the two has continued since part of a cross-licensing deal over technology patents expired on April 9th, and their increasingly bitter battle is worrying investors and the industry on both sides of the Atlantic.
The US International Trade Commission ruled against Qualcomm in a battle with rival Broadcom last week, banning imports of new advanced phones using chips the ITC said infringed on Broadcom patents.
Qualcomm has filed 11 patent suits against Nokia in less than two years, seeking damages and injunctions - so far without success.
Last month Nokia filed its first counter-suit against Qualcomm - related to chipset technologies.