Upon learning that the Top Hat name was already , Smith and Pappe changed the name to Sonic in 1959. The new name worked with their existing slogan, "Service with the Speed of Sound". After the name change, the first Sonic sign was installed at the Stillwater Top-Hat Drive-In; this was the first of three Sonics that would eventually exist in Stillwater. The original Sonic to carry the first sign was demolished and renovated in May 2015. Although Smith and Pappe were being asked to help open new franchise locations, no real was in place. The pair decided to have their paper company charge an extra for each Sonic-label hamburger bag it sold. The proceeds would then be split between Smith and Pappe. The first franchise contracts under this plan were drawn up, but still no joint , standardized , or detailed operating requirements were in place.
Following , Sonic founder returned to his hometown of , where he became employed as a . He decided to work delivering bread because bread was not as heavy as milk. Soon afterwards, Smith purchased the Cottage Cafe, a little diner in Shawnee, Oklahoma. Before long, he sold it and opened a , Troy's Pan Full of Chicken, on the edge of town. In 1953, Smith went in with a business partner to purchase a five-acre parcel of land that had a log house and a walk-up stand, already named the Top Hat. The two men continued with the operation of the root beer stand and converted the log house into a steak restaurant. After realizing that the stand was averaging 700 a week in the sale of root beer, , and , Smith decided to focus on the more-profitable root beer stand. He also bought out his business partner.
Although Sonic has operated since the early 1950s, Sonic Corp. incorporated in in 1990. It has its corporate headquarters in Oklahoma City; the headquarters building features a dine-in Sonic restaurant in an adjacent building. Its stock trades on with the symbol SONC. Company restaurants are owned and operated by Sonic Restaurants, Inc., a wholly owned subsidiary. Total 2011 revenues were around $546 million with net income of $19 million.
The F-6t is similar to the Type B, but is teal, yellow and red instead of camouflage-colored. It attacks by flying above Sonic and firing its Gatling gun, occasionally landing to fire its missiles. It appears as one of the first bosses in and its adaption, where it was fought and destroyed by Sonic. According to , this Big Foot is 3.4 meters (11 ft 11 in) tall, 4.8 meters (16 ft 3 in) wide, and weighs 9.2 metric tons (10.14 short tons).
|Tornado||+||Available during Super Sonic only|