When the new telephone exchange was finally started in Budapest in 1881, he was placed in charge of it. Here he made his first invention, then called a telephone repeater, or amplifier, but which today would be more descriptively called a loud speaker--an ancestor of the sound producer now so common in the home radio set. This invention was never patented and was never publicly described, but, Tesla later declared, in its originality, design, performance and ingenuity it would make a creditable showing alongside his better-known creations that followed.
He invented it around 1891.
December 7th 1943
Early in his life he was dealing with a case of colera which he almost died and the nervous breakdown in his elementary school/.
Even dought Nikola Tesla did not have any kids, he still has relative living. The youngest relative is Danijela Tesla, a beatiful 19 year old girl. Danijela is not the only relatives he got.
In 1875, Tesla enrolled at Austrian Polytechnic in Graz, Austria, on a Military Border scholarship.
He lived from 10 July 1856 to 7 January 1943.
Nikola Tesla in the 1880's did so.
Nikola Tesla worked for Thomas Edison for about a year in the 1880s before leaving due to disagreements over payment and differing opinions on electrical technology.
1879 at the Technical University of Graz, Austria, and the University of Prague.
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 dropped out of school during his last year at the Technical University in Graz, Austria, due to financial problems and a disagreement with his professors. He chose to pursue work experience rather than completing his studies.
He had the radio ready by 1893 but a fire broke in his lab. That is why Marconi launched his radio which he used some 17 patents from Tesla.