Which inventor was the first to appear in a commercial advertisement endorsing a product they didn't invent, establishing celebrity product endorsement as a marketing technique in 1904?

Throughout history, inventions and discoveries needed more than just innovation—they needed effective marketing to reach mass adoption. This trivia explores a pivotal moment when celebrity endorsements revolutionized product marketing in the early days of mass media. Test your knowledge about how one of history's most famous inventors leveraged advertising techniques that would forever change how discoveries reach consumers.

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Thomas Edison endorsing Grape-Nuts cereal
Alexander Graham Bell endorsing Singer sewing machines
Nikola Tesla endorsing Westinghouse electric fans
Marie Curie endorsing Radium Schokolade chocolate