Back in April 2010 IA Labs decided to take Nintendo to court, for alleged patent infringement, the judge ruled that Nintendo were not in the wrong and IA Labs lost the case in February 2012, they appealed the decision, but the court upheld the the ruling in June 2013, with IA Labs having to pay the court costs.
Unfortunately for IA Labs were unable to pay and were forced to hand over their entire Patent Portfolio to Nintendo.
Nintendo had this to say:
Nintendo’s track record demonstrates that we vigorously defend patent lawsuits, like the IA Labs lawsuit, when we believe we have not infringed another party’s patent. This includes holding those who sue Nintendo responsible for the costs and expenses incurred in patent litigation.
Nintendo has a long history of developing innovative products while respecting the intellectual property rights of others.
After reading that quote, check this WiiUHaX article:
Nintendo’s 3DS Royalty Woes