When Microsoft first sued TomTom for patent violations in TomTom's Linux-powered navigation devices, I wasn't sure how much of a fight TomTom would put up. Legally TomTom was between a rock and a hard place. You can't use restricted-use patents in GPLed software. If Microsoft just wanted to use the lawsuit as a hostile takeover tactic, TomTom didn't have anything like Microsoft's financial resources to fight them with.