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1880's
The first intentional transmission of a signal as an experiment was sent by David Edwards Hughes. -
1890's
Guglielmo Marconi built the first commercially successful wireless telegraphy system. -
1900's
Roberto Landell de Moura transmitted the human voice wirelessly with a distance of half a mile. -
1910's
Marconi opens up the worlds first purposely built radio factory. -
1920's
The first news program was brodcast by the station 8MK in Detroit. -
1930's
Single sideband and frequency modulation were invented. -
1940's
Commercial television transmissions started in America and Europe.
IN 1947 AT&T commercialized the Mobile telephone service. -
1950's
The Regency Company introduced a pocket radio. In 1955 the new company Sony produces its first transistorized radio. -
1960's
In the early 1960's color Television was being broadcast commercially. Not all stations were in color. -
1970's
In 1970, LORAN became the premier radio navigation system. -
1980's
The GPS is invented for the US Navy. -
1990's
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. -
2000's
Internet Radio is created.
