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Heinrich Rudolf Hertz was able to conclusively prove transmitted airborne electromagnetic waves in an experiment confirming Maxwell's theory of electromagnetism.
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In 1896, Marconi was awarded British patent and in 1897 he established a radio station in England.
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Roberto Landell de Moura, who transmitted the human voice wirelessly for a distance of approximately a half mile, received his first patent from the Brazilian government.
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Maconi opened he world's first purpose-built radio factory at New Street Works in Chelmsford, England.
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The first radio news program was broadcast August 31, 1920 by station 8MK in Detroit, Michigan
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In the early 1930s, single sideband and frequency modulation were invented by amateur radio operators.
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Commercial television transmissions started in North America and Europe in the 1940s.
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In 1955, the newly formed Sony company introduced its first transistorized radio.
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By 1963, color television was being broadcast commercially.
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In the 1970s, LORAN became the premier radio navigation system.
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The U.S. Navy experimented with satellite navigation, culminating in the launch GPS constellation in 1987.
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On November 7, 1994, WXYC became the first traditional radio station to announce broadcasting on the Internet
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Many US Internet broadcasters participated in a "Day of Silence" on June 26, 2007.
