WSJ Law Blog: “Octagon: The Trademark of Ultimate fighting Championship.”
“. . . Another mixed martial arts promoter has infringed upon UFC’s trademark of the octagon — the same eight-sided shape that tells drivers to STOP on the road — according to a ruling late last month by a federal judge in California. That’s right: UFC’s owner received a trademark on the octagon-shaped fighting mat back in 1998, and the court ruled UFC established common law rights on the eight-sided fence as well.