A United States judge has ordered the technology giant Apple to pay $506 million for infringing a patent owned by the University of Wisconsin-Madison.
The ruling by US district judge William Conley doubles the damages that were initially imposed on Apple in October 2015.
The University of Wisconsin-Madison sued Apple in 2014, on the grounds that the processors in some iPhone models infringe a patent it holds. The patent improves processor performance by predicting user behaviour, and was obtained in 1998 by the computer science researcher Gurindar Sohi and three of his students.