Billionaire Inventors

"To invent, you need a good imagination and a pile of junk." So said Thomas Edison, inventor of so many things we take for granted today and the archetypical American entrepreneur-inventor.
Edison became a rich man thanks to his imagination's ability to transform "piles of junk" into products and businesses that didn't previously exist. Today's more knowledge-based world may demand less physical junk and more service ideas as invention's starting point, but these 10 billionaire inventors are worthy heirs to Edison's tradition.

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