Gummo Marx a number of writers, and was well respected as a businessman. He rarely required contracts, believing that if the people he represented liked his work, they would stay with him; and if not, would seek representation elsewhere. Around the time he left his brothers' Vaudeville act, Marx applied for a patent for a clothes packing rack. On October 28, 1919, Marx was granted patent US1320335A. Gummo may have received his nickname because he had a tendency to be sneaky backstage, creeping up on others like a "gumshoe" (detective). Another explanation cited by biographers and family members is that Milton, the
Marx Brothers Cream" sketch. In a 1969 interview with Dick Cavett, Groucho said that the two movies made with Thalberg were the best that they ever produced. Despite the Thalberg films' success, the brothers left MGM in 1937; Thalberg had died suddenly on September 14, 1936, two weeks after filming began on "A Day at the Races", leaving the Marxes without an advocate at the studio. After a short experience at RKO ("Room Service", 1938), the Marx Brothers returned to MGM and made three more films: "At the Circus" (1939), "Go West" (1940) and "The Big Store" (1941). Prior to the release