Which inventor conducted extensive market research by sending prototype models to notable scientists and asking for feedback before finalizing their groundbreaking invention?

Throughout history, some of the most successful inventions weren't just technical achievements but also triumphs of market research. Before these products changed the world, their creators had to understand if consumers would actually want them. This trivia question explores how one famous inventor used early consumer psychology and market testing to refine a world-changing invention.

This is a live public trivia poll on AIPolls.Net. Vote and see real-time results.

Alexander Graham Bell with the telephone
Thomas Edison with the light bulb
Nikola Tesla with alternating current
Guglielmo Marconi with the radio