RIM, which is famous from its BlackBerry device was close to shut down its own services, when engaged in legal battle with NTP. I was not following it closely, but AFAIK RIM got negative feedback how was fighting with NTP. Finally they settled for something like 600 million USD.
Apple took its lesson and did not risk such danger for lucrative iPod market and settled with Creative. Well, OTOH Creative for sure is not a patent troll
….