Many pre-1952 cartoons were reissued with Perspecta Sound, which was introduced in 1954.
Like the other studios, MGM reissued and edited its cartoons when re-released to theaters. Finally, 19 cartoons were produced in widescreen CinemaScope format only. Four cartoons were produced for both Academy Ratio and CinemaScope formats (2.55:1, later 2.35:1). Most of these cartoons were produced in the standard Academy ratio (1.37:1). Quimby retired in 1955 and from 1956 to 1958, Hanna and Barbera produced the shorts until MGM closed the cartoon studio in 1958, and the last cartoon was released in 1958. Rudolf Ising was the producer of Puss Gets the Boot subsequent cartoons were produced by Fred Quimby through 1955. All cartoons were released to theaters by Metro-Goldwyn-Mayer. The following 114 cartoons were directed by William Hanna and Joseph Barbera at the Metro-Goldwyn-Mayer cartoon studio in Hollywood, California.
3 1961–1962: Gene Deitch/Rembrandt Films cartoons.
