Who invented radio? It is a quite difficult answer due to the complex interwoven involvement of several scientific, technical, historical and even litigation on patent infringements based in the work of so many researchers like:  James Clerck Maxell, David Hughes, J.C. Bose, Heinrich Hertz, Oliver Lodge, Alexander Popov, Guglielmo Marconi, Nikola Tesla, Reginald A. Fessenden, Lee De Forest and certainly of the Brazilian Roberto Landell de Moura.
Father Landell de Moura, as he preferred to be called, was a Brazilian wireless pioneer as on June 3rd, 1900, he demonstrated his wireless speech transmitting equipment in São Paulo city, Brazil.
A man out the time he was granted with a Brazilian patent, nº 3729, as well as after an intensive work conducted under his own expenses in the USA, led the US Patent Office in 1902/03 awarded him three patents: 775337, 775846 and 77917 respectively for his wireless telephone, wireless telegraph and on a wave transmitter. For more information on the subject please refer to James P. Rybak’s article published in the Antique Wireless Association journal, formerly Old Timer’s Bulletin, February 2002, USA.
Even considering his advanced ideas for a reliable wireless transmission of the speech he faced innumerous technical, lack of funds and political difficulties to find prospective possibilities to revert his patents for commercial application purposes.
In the meantime another two Brazilians, Jose Ildefonso de Oliveira and Agenor Queiroz working in Sorocaba, a nearby city of São Paulo faced similar difficulties as found by Landell de Moura since considering the unknown nature of the experiments they were forced by the local police to interrupt their work for the wireless transmission of the electrical signals.
Nevertheless as a forerunner of modern Radio Telephony – the wireless transmission of speech – he had his ideas spread all over the world since the miracle of radio as a consequence of the interleaved mass of strands due to the continuous incremental steps of sudden enlightenment of startling discoveries it was possible in 1918 only, when Frank Conrad working at the Westinghouse laboratory joined together the microphone and the thermionic valve opening to the world the first radio station – KDKA - given birth of the broadcasting as known as today.
Thus, since his famous public experiments Fr. Landell de Moura set a place in the hall of radio’s men of science. Therefore as the so long claimed just right homage to a true native radio pioneer, the Brazilian government through the country Post Office has issued a stamp commemorating the 150 years of the birth of Roberto Landell de Moura in last January 21st 2011.

The first broadcasting radio transmission took place in Brazil on September 7th, 1922 through the transmitters of Radio Sociedade do Rio de Janeiro, Call SQ1A, originally found by Dr. Edgard Roquette Pinto and several collaborators. The illustration is a graphic arrangement made by the editor of the magazine “Radio Phono”, 1930 edition, displacing the new radio station Call, PRAA.  

Source: Magazine Radio Phono.

Bernardo Kocubej found his Company, “Indústria e Comércio de Rádios Invictus”, one of the first makers of radio receivers in Brazil. Kocubej was an innovator and a Brazilian entrepreneur in the electronic field by producing the first television receivers supplied with his own made kinescopes or image tubes.

Source: collection Golda Kocubej.

Mario Fanucchi, graphical designer responsible for vignette production at “TV Tupi” network, created a stylized TV test pattern like a small Indian which was on the air in the beginning of the PRF-3 transmissions. Soon christened as the small Indian “Tupiniquim”, the new cartoon in childlike style display its plume with antennas arising a pleasant look mainly for the infantile audition besides binding a new marketing identity to the station, already known as responsible to bring the television technology to Brazil.

Source: Fonte: - Book: "The Voice of the Electrical and Electronics Industry in Brazil", ABINEE, São Paulo, 2008.

Sylvania Produtos Elétricos starts the colored kinescope-making in Brazil at his facilities located in São Paulo. A painstaking manufacture process comprises several steps of industrial sequential stages and certainly, including an accurate quality-control to check the component’s electrical performance as well as operational condition regarding the vacuum and luminosity level and finally the quality of the image projected by the cathode.

Source: Antenna Magazine.