The lone inventor is a myth. Indeed, a device can be invented numerous times, each time independently by a separate individual, before it becomes common knowledge. What's to say that multiple folks didn't invent the wheel? (Indeed, there WERE wheeled toys in the Central American civilizations of old - just not bigger uses of wheels. Nonetheless, the Mormons pounce on the toys as "proof" of their mythology, which has ancient Israelites settling the Americas, bringing along wheeled chariots, and "falling from grace" and becoming Native Americans. Nice story, but the facts don't match the evidence out there.)