Two of the world's largest PC makers still can't seem to get along.
Acer is suing Hewlett-Packard again for patent violations. It's an escalation of the battle over the two companies' intellectual property that began earlier this year.
Filed in a U.S. District Court in Wisconsin and with the U.S. Internaional Trade Commission Tuesday, Acer said it is countersuing HP for infringing on its patents related to servers, PCs, and peripheral devices. HP declined to comment on Acer's suit.