Was TESLA, THe master of lightning, ever an American?

Question

i know for sure that he was an immigrant but im not sure if he got a license? to be an american

Answer 1

NIkola Tesla was born an ethnic Serb citizen of the Austrian Empire and later became an American citizen.
In 1884, Tesla first arrived in the US.
On July 30, 1891, he became a naturalized citizen of the United States at the age of 35.

Answer 2

He became a naturalized citizen of the United States when he was 35. His biography is given in the book "Prodigal Genius" by John J. O'Niell and is also on the website listed below.