At the spring 1893 meeting of the national electric light association in st outs, tesla gave his 1st public demonstration of wireless transmission of electrical energy and thereby, the feasibility of wireless communication.
Valone Op Cit
At the first exhibition on electrical apparatus in Madison Square Gardens, he demonstrated the famous experiment in which he controlled the movement of a model boat remotely using radio waves. He submitted a patent application under the title “Method of and Apparatus for Controlling Mechanism of Moving Vehicle or Vehicles”, no. 613,809 on July 1. It was granted by the US Patent Office on November 8 that year. Aware of the great importance of this patent, he protected it in eleven countries.