The case, which was filed by Nintendo of America in February this year, sought to turn over the privately held WiiU.com domain, which was originally registered in 2004; seven years before the announcement of the company's current game system in April 2011.
The verdict, which was handed down over the weekend, found in favour of the original website holder. While no information was provided on Nintendos options or intentions to appeal the decision, the company may yet elect to attempt to purchase the domain from its current owner in a private sale.
In May this year, Microsoft began proceedings with the National Arbitration Forum to claim ownership of the XboxOne.com and XboxOne.net domains, following the announcement of its upcoming next-generation home console. The two domains were originally registered in December 2011, and are currently held by a London resident.