It appears that there is a big fight brewing in the GPS business as Garmin is suing Tom Tom over the use of several patents. Specifically, Garmin filed two suits against Tom Tom stating that they have infringed on 5 Garmin patents used to make using their GPS systems easier to use. The patents cover a range of functions including the removal of unimportant streets from the view to make it easier to view the car on the map. Not a whole lot more information has been published about the lawsuit as of yet, but expect to see more as the case approaches a trial.