Desilu Productions, Inc. was an American television production company founded and co-owned by husband and wife Desi Arnaz and Lucille Ball. The company is best known for shows such as "I Love Lucy", "The Lucy Show", "Mannix", "The Untouchables", "Mission: Impossible" and "Star Trek". Until 1962, Desilu was the second-largest independent television production company in the United States, behind MCA's Revue Studios, until MCA bought Universal Pictures and Desilu became and remained the number-one independent production company until Ball sold it to Gulf and Western Industries (then the parent company of Paramount Pictures) in 1968.

Source: Wikipedia