In 1900, Brazilian priest Roberto Landell de Moura transmitted the human voice by wireless. According the newspaper Jornal do Comercio (June 10, 1900), he conducted his first public experiment on June 3, 1900, in front of journalists and the General Consul of Great Britain, C.P. Lupton, in Sao Paulo, Brazil, for a distance of approximately 8 km. The points of transmission and reception were Alto de Santana and Paulista Avenue.[19]

One year after that experiment, he received his first patent from the Brazilian government. It was described as "equipment for the purpose of phonetic transmissions through space, land and water elements at a distance with or without the use of wires." Four months later, knowing that his invention had real value, he left Brazil for the United States of America with the intent of patenting the machine at the U. S. Patent Office in Washington, DC.

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