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First Radio Signal
The first radio signal was likely made by Guglielmo Marconi some time in 1895. He likely just sent a morse code. It is not certain whether or not he truly was the first one to accomplish this however he patened it. -
Audion Tube
In 1906, Lee De Forest invented the audion tube.This tube amplifies signals distance, radio or otherwise.
Reginald Fessenden supposedly came up with the idea for the audion, but he was never properly recognized. -
The Coming of Radio Stations
The first commercial radio station, 8XK, came about in 1920. Its name would be later changed to, as it is known today KDKA. -
Advertising on Radio
Radio WEAF aired a commercial that lasted 10 minutes for an apartment complex.. -
FIrst Signs of Radio.
Nikolai Tesla had demonstrated wireless radio communication in St. Louis, Missouri.