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Guglielmo Marconi
Using a simple spark-gap transmitter sent a wireless telegraphic signal approximately 1 1/2 miles across his father's Italian estate -
The first AM Radio
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Guglielmo Marconi
First person to transmit signals across the Atlantic Ocean -
Period: to
World War 1
During the war, the military used it almost exclusively and it became an invaluable tool in sending and receiving messages to the armed forces. -
Warren G. Harding James M. Cox
The first broadcasters . -
Amos 'n' Andy
Radio first hit show -
NBC
NBC was the first broadcasting company -
Edwin H. Armstrong
He is the person who created FM radio
