Tesla is Serbian who was born in Croatia. He eventually moved to the US. According to his book there are many more inventions we don't know about. The movie the Prestige could have been onto something for all we know.
http://www.ranker.com/list/nikola-tesla_s-greatest-theories-and-patents-and-inventions/stokified,
Wireless Transmission of Electricity
X-rays
Electric Submarine
Radio
Remote Control
Robotics
Thought Camera
Fluorescent Bulbs
Earthquake Machine
Fluid Propulsion