Established in 1953, Sonic Corp. is a chain of drive-in restaurants operating and franchising more than 3,500 Sonic Drive-Ins. Based in Bernice, La., Sonic Corp. specializes in fast food, specialty menu items and personal service. Its menu items include Toaster sandwiches, Footlong Quarter Pound Coneys, onion rings, tater tots and a variety of Frozen Favorites desserts and Fountain Favorites...