In 1991, Turner Broadcasting bought the Hanna-Barbera library, and in 1994, with the growing popularity of Turner's then-new cable channel Cartoon Network, Hanna-Barbera founded a division named Cartoon Network Studios, which was designed to produce new animation exclusively for Cartoon Network under the H-B brand name or Cartoon Network's name. With the premiere of World Premiere Toons in 1995, young H-B animator Genndy Tartakofsky created a pilot for "Dexter's Laboratory" to air on the show (later aired as a regular episode in the main series, retitled "Changes"), and the following year, Dexter was greenlit to become Cartoon Network's first "Cartoon Cartoon" animated series.
Initially, the ending of the show contained a logo for Cartoon Network Studios with a byline reading "A Division of Hanna-Barbera Cartoons," but for the 1997-1998 season, the show was released under Cartoon Network Studio's parent company's name (by this point, Turner had merged with Time Warner), initially with the above-pictured logo at the end, and on the Ego Trip TV movie with the classic 1980s H-B "Swirling Star" closing logo (which was also used on The Powerpuff Girls at the time).
In 1998, Hanna-Barbera became an in-name-only unit, now owned by Warner Bros. Animation, and Cartoon Network Studios became a separate facility, dropping using Hanna-Barbera's name in 2001 with the death of William Hanna (all subsequent episodes since then carry a Cartoon Network Studios logo and copyright.)