Mattel Matson sold his share to Handler due to poor health, and Handler's wife Ruth took Matson's role. In 1947, the company had its first hit toy, a ukulele called "Uke-A-Doodle". The company incorporated the next year in California. Mattel became the first year-round sponsor of the "Mickey Mouse Club" TV series in 1955. The Barbie doll debuted in 1959, becoming the company's best-selling toy in history. In 1960, Mattel introduced Chatty Cathy, a talking doll revolutionizing the toy industry, which led to pull-string talking dolls and toys flooding the market throughout the 1960s and 1970s. The company went public in
Carole E. Handler 1998, Handler took on the case of Holocaust rescuer (Righteous Gentile) Irene Gut Opdyke when Opdyke tried to re-gain the rights to tell the "authorized" account of her life story, which she had previously assigned in a lawful motion picture option agreement. Handler worked with the parties to reach an agreement and the case was dismissed with prejudice. In an ironic twist, after the trial, all parties agreed that the promoter did "nothing wrong." Opdyke publicly acknowledged the promoter who she sued by thanking him in her book, “In My Hands” and agreed to give him a producer credit for