3 ms·

Nikola Tesla

• mixmax 18y ago
  What idea did Tesla sell? I'm aware of him working as a scientist for most of his life, but not selling an idea according to the criteria stated above.
  • tyohn 18y ago
    I believe that Tesla sold several of his patents.
    • thwarted 18y ago
      Doesn't a (non-software) patent require something resembling a semi-working prototype (at least back when Tesla was getting patents)? I say "semi-working" because there are a lot of patents for things like free-energy devices that never worked, but were built.