Jurors don't have to be ignorant of a subject to be objective. Further, it's up to the lawyers on both sides to dismiss a juror during selection if they think t

Jurors don't have to be ignorant of a subject to be objective. Further, it's up to the lawyers on both sides to dismiss a juror during selection if they think they'll be biased. They didn't, probably because both sides -- believing they were in the right -- thought that someone with knowledge of patents would ultimately see things their way.