Tesla demonstrated "the transmission of electrical energy without wires" as early as 1891. When Tesla was 41 years old, he filed the first basic radio patent (No. US645576). The year was 1897.
Nikola Tesla
Guglielmo Macaroni and Nikola Tesla
In 1891, Tesla invented the Tesla coil, which was widely used in radios and television sets. A Tesla coil is a type of resonant transformer circuit.
Nikola Tesla invented the Tesla coil in 1891 when he was 35 years old.
Nikola Tesla
Nikola Tesla
nikola tesla
Nikola Tesla
Nikola Tesla
Nikola Tesla invented AC, probably a transformer as well but don't quote that.
It was invented in 1895 by Nikola Tesla.
He invented it around 1891.