The prolific American inventor who sold his greatest hits for pocket change

The Greatest Inventor You've Never Heard Of · 9:48 · Video: Today I Found Out · Watch at the source

In short: Walter Hunt possessed one of the finest inventive minds in American history, yet remains largely forgotten. This video explores his life and the common household items he created, explaining why his habit of selling patents for quick cash kept him from achieving lasting fame or fortune.

Walter Hunt was an exceptionally prolific inventor whose creations are likely in your home today, most notably the safety pin. Despite his genius, Hunt struggled financially throughout his life, often selling his patents for small sums to cover immediate debts—such as the $15 he owed when he sold the rights to the safety pin for a few hundred dollars.

His output was vast and varied, ranging from practical tools like a rope-making machine, a nail-making machine, and an improved fountain pen, to more complex designs like a commercially viable lockstitch sewing machine and an early repeating rifle. Perhaps his most unusual invention was the 'antipodean apparatus,' a device that enabled users to walk on ceilings, which he sold to a circus.

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