An anonymous reader writes: Apple has frequently been in the news for various patent battles, but it's usually against one of their competitors. This time, Apple is on the losing end, and they're losing to the University of Wisconsin-Madison. A jury found that the university's patent on improving processor efficiency (5,781,752) was valid, and Apple's A7, A8, and A8X infringed upon it. Those chips are found within recent iPhone and iPad models. Because of the ruling, Apple could be liable for up to $826.4 million in damages, to be determined by later phases of the trial.