Money Duke’s Mayonnaise sues Duke Sandwich, claims company copied label colors and misleads customers October 9, 2019 Haley Walters, The Greenville News Comments Off on Duke’s Mayonnaise sues Duke Sandwich, claims company copied label colors and misleads customers The companies share a common founder, Eugenia Duke, who invented a mayonnaise recipe and in 1917 began selling sandwiches for soldiers in World War I.