Hanna Barbera

Hanna-Barbera Cartoons, Inc. ( bar-BAIR-ə) (founded and formerly known as H-B Enterprises, Hanna-Barbera Productions, Inc. and H-B Production Co.) was an American production company, which was active from 1957 until its absorption into Warner Bros. Animation in 2001. Founded on July 7, 1957 by Tom and Jerry creators William Hanna and Joseph Barbera along with George Sidney, it was headquartered at the Kling Studios from 1957 to 1960, then on Cahuenga Blvd from 1960 to 1998 and subsequently at the Sherman Oaks Galleria in Sherman Oaks from 1998 to 2001…Wikipedia