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1 CE
2008
An April 2008 Arbitron survey[5] showed that, in the US, more than one in seven persons aged 25–54 years old listen to online radio each week.[6] -
1864
james Clerk Maxwell showed in theoretical and mathematical form in 1864 that electromagnetic waves could propagate through free space. -
1888
In 1888 Heinrich Rudolf Hertz was able to conclusively prove transmitted airborne electromagnetic waves in an experiment confirming Maxwell's theory of electromagnetism. -
1894
Over several years starting in 1894 the Italian inventor Guglielmo Marconi built the first complete, commercially successful wireless telegraphy system based on airborne Hertzian waves (radio transmission). -
1895
By August 1895 Marconi was field testing his system but even with improvements he was only able to transmit signals up to one-half mile, a distance Oliver Lodge had predicted in 1894 as the maximum transmission distance for radio waves. -
1896, 1897
In 1896, Marconi was awarded British patent and in 1897 he established a radio station in England -
1909
Marconi would go on to win the Nobel Prize in Physics in 1909 and be more successful than any other inventor in his ability to commercialize radio and its associated equipment into a global business. -
1954
In 1954 Regency introduced a pocket transistor radio, the TR-1, powered by a "standard 22.5V Battery" -
1990-1991
In 1900, Brazilian priest Roberto Landell de Moura transmitted the human voice wirelessly for a distance of approximately a half mile. One year after that experiment, he received his first patent from the Brazilian government.
