Just months after the Nintendo 3DS launched in 2011, it faced patent infringement allegations. Tomita Technologies was accusing Nintendo's new handheld of using its glasses-free 3D display technology without paying royalties. Like most patent lawsuits, it dragged on for years -- first awarding a victory to Tomita before handing the win to Nintendo in appeals. Now, a higher court has confirmed Nintendo's victory. On Friday, the Federal Circuit court ruled that the Nintendo 3DS does not infringe Tomita's patent.