I'm surprised they didn't boot him after finding out he had a patent to his name. That seems like it would obviously put you on the pro-patent-issuer side.
The juror has something to gain with the legitimization and precedent that his jury will decide especially in such a high profile case. Diminishingly so for someone in an auto case.
It usually comes up around drug trials: juries aren't bound the way judges are to respect, well, anything. A jury can decide to (say) find a man not guilty of having marijuana even if he was smoking it in court, because they believe it does not deserve punishment.
Likewise, juries could decide to begin nullifying patent law by always finding infringers not guilty, at least when the patents in question are as absurd as many people feel they are.