APPLE INSIDER
Apple won’t be able to get back any of the $454 million it paid to VirnetX for infringing patents even after those patents were invalidated, a judge ruled on Tuesday.

In March, VirnetX confirmed that Apple sent a $454 million payment for infringing several of its patents through the FaceTime and VPN on Demand features. The payment capped a legal saga a decade in the making.
Source: APPLE INSIDER