Rudolf Ising was an American producer and director of animated short films. Some of the titles he is known for are The Calico Dragon (1935), The Old Mill Pond (1936), The Hound and the Rabbit (1937), Puss Gets the Boot (1940), The Milky Way (1940), and Bats in the Belfry (1942).
Merrie Melodies starring Clarence In "Goldfish Follies" (1932)
The studio was not the "WB cartoon studio" in 1930. It was the Harman-Ising Studio from 1930-33, the Leon Schlesinger Studio from 1933-45 and only the WBB Animation studio after that. Fleischer studio
