Thomas Edison is probably the most famous and productive inventor of all time, with more than 1,000 patents in his name, including the electric light bulb, phonograph, and motion picture camera. He became a self-made multimillionaire and won a Congressional Gold Medal. Edison got a late start in his schooling following an illness, and, as a result, his mind often wandered, prompting one of his teachers to call him "addled." He dropped out after only three months of formal education. Luckily, his mother had been a schoolteacher in Canada and home-schooled young Edison.