Apple Inc. could be facing up to US$862 million in damages after a US jury found it used technology owned by the University of Wisconsin-Madison without permission.
The technology was used in chips found in many of the iPhone maker’s most popular devices.
The jury in Madison, Wisconsin also said the patent, which improves processor efficiency, was valid.
The trial will next determine how much Apple owes in damages, Reuters reports.
The Wisconsin Alumni Research Foundation (WARF) sued Apple in January 2014 alleging infringement of its 1998 patent for improving chip efficiency.
The jury was considering whether Apple’s A7, A8 and A8X processors, found in the iPhone 5s, 6 and 6 Plus, as well as several versions of the iPad, violate the patent.
Apple denied any infringement and argued the patent is invalid, according to court papers.
It previously tried to convince the US Patent and Trademark Office to review the patent’s validity but in April the agency rejected the bid.
According to a recent ruling by US District Judge William Conley, who is presiding over the case, Apple could be liable for up to US$862.4 million in damages.
WARF used the patent to sue Intel Corp. in 2008 but the case was settled the following year on the eve of trial.
Last month, WARF launched a second lawsuit against Apple, this time targeting the company’s newest chips, the A9 and A9X, used in the just-released iPhone 6s and 6s Plus, as well as the iPad Pro.
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