A US federal jury in East Texas has ordered Apple to pay $US625.6 million ($A870.76 million) after finding that Apple services like FaceTime and iMessage infringed on technology patents held by Nevada patent-holding company VirnetX.
VirnetX had previously won a $US368 million verdict against Apple on similar claims in 2012. That award was overturned by an appellate court, which ordered a new trial.
While an attorney for VirnetX praised the verdict, Apple vowed to appeal and said the case shows a need for patent-system reform.
Apple has won appeals in similar cases after losing in East Texas, which is known for large judgments in patent claims.
VirnetX is a company that buys technology patents and aims to make money from licensing fees and lawsuits. It has previously sued Microsoft, Cisco and others.
