In a court filing in Delaware, Nokia said it has paid Qualcomm about $1 billion over 15 years for access to the chipmaker’s “early” mobile technology patents. The world’s largest handset maker said that according to the two’s 1992 and 2001 agreements, the patents are now paid up and royalty-free.

Qualcomm and Nokia are currently embroiled in a number of patent litigation disputes across three continents, since they failed to renew a technology licensing agreement that expired in April of last year. 

Nokia has argued that it pays too much for Qualcomm’s technology and that

Qualcomm undervalues the technology it licenses from Nokia.

Qualcomm has argued that while Nokia continues to ship products using its patented technology, it agrees to the same licensing terms.

The two recently agreed to consolidate two U.S. cases into one in Delaware and Nokia recently won a battle where the U.K. High Court ruled two Qualcomm GSM patents invalid.