 As the company expanded, it was subject to several legal issues regarding trademarks. Because of its use as a case study in American law schools, one of the most prominent incidents of infringement in the United States occurred with the similarly named Burger King located in Mattoon, Illinois. Eugene and Elizabeth Hoots owned an ice cream shop in the city of Mattoon; due to the success of the store, in 1957 they expanded it with an additional shop in a former garage next to the original operation. Keeping with theme related to the name of the ice cream shop, Frigid Queen, they named their burger stand Burger King and registered their trademark with the state of Illinois in 1959. In 1962 The Hootses, with knowledge of the Federal trademark held by Burger King Corporation, added a second location in Charleston, Illinois.
