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The first intentional transmission of a signal as an experiment was sent by David Edwards Hughes.
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Guglielmo Marconi built the first commercially successful wireless telegraphy system.
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Roberto Landell de Moura transmitted the human voice wirelessly with a distance of half a mile.
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Marconi opens up the worlds first purposely built radio factory.
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The first news program was brodcast by the station 8MK in Detroit.
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Single sideband and frequency modulation were invented.
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Commercial television transmissions started in America and Europe.
IN 1947 AT&T commercialized the Mobile telephone service. -
The Regency Company introduced a pocket radio. In 1955 the new company Sony produces its first transistorized radio.
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In the early 1960's color Television was being broadcast commercially. Not all stations were in color.
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In 1970, LORAN became the premier radio navigation system.
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The GPS is invented for the US Navy.
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In 1994, the U.S. Army and DARPA launched a software-defined radio that can be programmed to be virtually any radio by changing its software program. Digital transmissions began to be applied to broadcasting in the late 1990s.
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Internet Radio is created.
