Hint: Makers of famous cartoon series
Answer: Hanna-Barbera Productions, Inc.
Quoting Govind P Sahu.
"Hanna-Barbera Productions, Inc. (also called Hanna-Barbera Cartoons, Inc., H-B Enterprises, Inc., or simply Hanna-Barbera), was an American animation studio that dominated North American television animation during the second half of the 20th century. The company was originally formed in 1957 by former MGM animation directors William Hanna and Joseph Barbera and live-action director George Sidney in partnership with Columbia Pictures' Screen Gems television division as H-B Enterprises. Today, Hanna-Barbera Productions is now an in-name-only unit of Warner Bros. Animation."
