Marketing Disney challenges Deadmau5 over trademark registration The musician, whose real name is Joel Zimmerman, filed to register a mark that depicts a smiling, black mouse head with big, round ears. Disney’s attorneys have jumped on it. By Matt WilsonApril 3, 2014 SHARE Ragan Insider Premium Content To read the full story, log in. Become a Ragan Insider member to read this article and all other archived content. Sign up today Already a member? Log in here. Learn more about Ragan Insider.