Cause of death: surgical complications
Ruth Marianna Handler (née Mosko; November 4, 1916 – April 27, 2002) was an American business magnate and inventor. She is best known for inventing the Barbie doll in 1959, and being co-founder of toy manufacturer Mattel with her husband Elliot, as well as serving as the company's first president from 1945 to 1975.
The Handlers were forced to resign from Mattel in 1975 after the Securities and Exchange Commission investigated the company for falsifying financial documents.
Handler was prominently characterized in the 2023 film Barbie.
Source : Wikipedia