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Scottish physicist, James Clerk Maxwell predicted the existence of radio waves; and in 1886, German physicist, Heinrich Rudolph Hertz demonstrated that rapid variations of electric current could be projected into space in the form of radio waves similar to those of light and heat.
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Some people believe that Marconi send the first signal. He had good PR.
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Lee Deforest invented space telegraphy, the triode amplifier and the Audion. In the early 1900s, the great requirement for further development of radio was an efficient and delicate detector of electromagnetic radiation.
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radiotelegraph service was instituted between five Hawaiian Islands. By 1903, a Marconi station located in Wellfleet, Massachusetts, carried an exchange or greetings between President Theodore Roosevelt and King Edward VII. In 1905 the naval battle of Port Arthur in the Russo-Japanese war was reported by wireless, and in 1906 the U.S. Weather Bureau experimented with radiotelegraphy to speed notice of weather conditions.
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Charles David Herrold, an electronics instructor in San Jose, California constructed a broadcasting station.
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The RMS Titanic sank. While in distress, it contacted several other ships via wireless. After this, wireless telegraphy using spark-gap transmitters quickly became universal on large ships. The Radio Act of 1912 required all seafaring vessels to maintain 24-hour radio watch and keep in contact with nearby ships and coastal radio stations
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speech was first transmitted across the continent from New York City to San Francisco and across the Atlantic Ocean from Naval radio station NAA at Arlington, Virginia, to the Eiffel Tower in Paris.
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First regular broadcasts on 9XM (now WHA) - Wisconsin state weather, delivered in Morse Code
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after the government released its control of all patents, the Radio Corporation of America (RCA) was established with the purpose of distributing control of the radio patents that had been restricted during the war.
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The first known radio news program was broadcast by station 8MK, the unlicensed predecessor of WWJ (AM) in Detroit, Michigan.
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Westinghouse's KDKA-Pittsburgh broadcast the Harding-Cox election returns and began a daily schedule of radio programs.
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high seas public radiotelephone service was inaugurated. At that time telephone contact could be made only with ships within 1,500 miles of shore. Today there is the ability to telephone nearly every large ship wherever it may be on the globe.
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Edwin Howard Armstrong invented frequency-modulated or FM radio in 1933. FM improved the audio signal of radio by controlling the noise static caused by electrical equipment and the earth's atmosphe.
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the Supreme Court of the United States, in a case on radio patents involving the U.S. government vs the Marconi Company, restores some of the prior patents of Oliver Lodge, John Stone Stone, and Nicola Tesla.
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the first Master FM Antenna system in the world designed to allow individual FM stations to broadcast simultaneously from one source was erected on the Empire State Building in NYC.
