-
Heinrich Rudolf Hertz was able to prove transmitted airborne electricmagnetic waves in an experiment confirming Maxwell's theory of electromagnetism..
-
The Italian inventor Guglielmo Marconi built the first wireless telegraphy system based on radio transmission. He then showed radio to military and marine communications and started a company for radio communication services. He is also credited for saving the 700 people that survived the titanic.
-
Brazilian priest Roberto Landell de Moura transmitted the human voice for a half mile. A year after the experiment he had a Brazilian patient and then he knew he could have real potential. The next advancement was the vacuum tuber which led to the first radio program broadcast.
-
Marconi then led the world's first purpose-built radio factory in England.
-
This was invented by amateur radio operators. By the end of the decade, they were established commercials.
-
Commercial televisions transmission started in the 1940s in North America and Europe. This led to in 1947 AT&T commercialized the first mobile telephone service.
-
The regency company introduced the Pocket transistor radio. Later in the 1950s Sony came out with it's first transistorized radio.
-
In 1963 color television was being broadcast commercially and then later the first radio communication satellite was launched. Then in the late 1960s the U.S. long distance telephone network began to change to a digital network.
