Sonic Fact 1 by Laura Savard | 2018/07/07 | Uncategorized HomeBrand FactsSonic Fact 1DID YOU KNOW: Sonic was originally named “Top Hat” but the name was already trademarked by a competitor, so in 1959 the name was changed to Sonic, to match the restaurant’s “Service with the Speed of Sound” slogan.[addtoany]See More Brand Facts