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In the 1800s Heinrich Hertz learned that through electromagnetic waves, electricity can be transmitted.
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Telsa propsed an idea to trasmit intell & wireless power using the earth as a medium.
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Radio telegraphy service instituted in five Hawaiian islands
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An Italian inventor sent the first successful transatlantic telegraph message
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The U.S. Weaher Bureau used radiotelegraphy to take notice of weather conditions faster.
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radio got its first voice on Christmas eve 1906 when ships, and radio opperators listend for traffic messages.
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The 1920s-1940s were called "The Golden Age" for radio. During this period radio was revolutionized.
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First radio commercial station hit the air in pennsylvania
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In 1923 Edwin Armstrong invented a radio called the superhetrodyne radio
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Galvin Corp. introduced one of the first cars with radio installation.
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The transistor was introduced and made radios more compact