John Morrison is called by several names and that includes the Mayor of Slamtown. It seems he has filed a trademark related to that name.
Morrison has filed a trademark for Slamtown on November 23rd according to Heel By Nature.
While using his real name John Hennigan, he locked down the nickname in such a way that he can use it for professional wrestling. The following was noted: “Sports information in the field of wrestling; Entertainment in the nature of wrestling contests.”