Guglielmo Marconi.
It wasn't an American,but Italian inventor Guglielmo Marconi in 1895
While the wireless or radio was invented in 1895, it was not used for entertainment until about 1920. The first radio station was started in Pittsburgh, PA in 1920 with commercial radios beginning sales about that time.
by creating a mass culture
Edwin Armstrong did not invent radio, however he invented several improvements to radio.1913, the regenerative circuit (making oscillators possible, making the earlier sparkgap radios obsolete)1917 to 1919, superheterodyne radio receivers1921, super-regenerative radio receiversmiddle 1920s, frequency modulationEdwin Armstrong received 42 patents in total.
There is a big debate about this. Some people say Marconi invented what became radio. Some people say it was Tesla. In America, a number of amateur radio fans designed and then built their own radios, as far back as 1901-5. It is difficult to say who was the first to do so, since the state of the art evolved gradually. But by the 1910s, there were radio manufacturing companies selling the parts needed to make a radio, and by the early 1920s, there were manufacturers selling completely assembled radios.
a national culture
the radio was not invented in the 1920s, but it came out in the 1920s when people could buy them
While the wireless or radio was invented in 1895, it was not used for entertainment until about 1920. The first radio station was started in Pittsburgh, PA in 1920 with commercial radios beginning sales about that time.
In the 1900s technologies such as radio broadcasting and movies dominated american society.
Radio
radio
The drill press was invented in the 1920s
radio
the radio.
Around the 1920s.
wind turbine
in the 1920s in the us.
1920s