In both Data East USA, Inc. v. Epyx, Inc. and Capcom U.S.A. Inc. v. Data East Corp., the courts did not recognize copyright protection in many game mechanics and character designs that were seen as essential to creating a martial arts themed fighting game.[26] In later cases such as Tetris Holding, LLC v. Xio Interactive, Inc. and Spry Fox, LLC v. Lolapps, Inc., courts have recognized copyright infringement where there is evidence that one game copied another’s unique expression, more than just imitating the general idea.[28][29][30]