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| | at:1864 text:"[[James Clerk Maxwell]] mathematically predicts the existence of radio waves." | | at:1864 text:"[[James Clerk Maxwell]] mathematically predicts the existence of radio waves." |
| | at:1872 text:"Mahlon Loomis and W. H. Ward (USA) file for U.S. Patents for a "wireless telegraph"." | | at:1872 text:"Mahlon Loomis and W. H. Ward (USA) file for U.S. Patents for a "wireless telegraph"." |
| − | at:1885 text:"[[Heinrich Rudolf Hertz|Heinrich Hertz]] begins experiments into the existence of radio waves using a primitive transmitter and receiver. "
| + | |
| − | at:1886 text:"Hertz concludes primitive transmitter and receiver experiemnts."
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| − | at:1887 text:"Hertz publishes his research in the journal Annalen der Physik".
| |
| − | at:1890 text:"[[Edouard Branly]] invents the [[coherer]]."
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| − | at:1891 text:"[[Nikola Tesla]] is granted U.S. Patent No. 454,622 "System of Electric Lighting," first revealing the basic techniques for greatly improving radio transmitter performance."
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| − | at:1892 text:"Hertz publishes "Untersuchungen Ueber Die Ausbreitung Der Elektrischen Kraft” (“Investigations on the Propagation of Electrical Energy”)."
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| − | at:1893 text:"Tesla demonstrates "wireless telegraphy" at the Franklin Institute in Philadelphia and the National Electric Light Association, demonstrating the practical application eight years after Hertz experiments."
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| − | at:1894 text:"The book 'Invention, Researches, and Writings of Nikola Tesla', edited by T.C. Martin is published."
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| − | at:1894 text:"Hertz dies at age 37."
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| − | at:1894 text:"[[Alexander Stepanovich Popov|Alexander Popov]] builds his first radio receiver in [[Russian Empire|Russia]]. This was the first non-laboratory radio service."
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| − | at:1894 text:"Oliver Lodge transmits radio signals at a meeting of the [[British Association for the Advancement of Science]] at Oxford University on August 14. One year before Marconi but one year after Tesla."
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| − | at:1894 text:[[Jagadish Chandra Bose]] uses electromagnetic waves to ignite gunpowder and ring a bell at a distance in November in [[Calcutta.]]""
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| − | at:1895 text:"Popov presents his radio receiver to the Russian Physical and Chemical Society on May 7. The paper on his findings was published December 15."
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| − | at:1895 text:"[[Marconi]] transmits wireless signals a distance of about one mile."
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| − | at:1896 text:"Tesla transmits wireless signals over distances of up to 30 miles."
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| − | at:1897 text:"Tesla is granted U.S. Patents No. 645,576 and 649,621 covering the four-tuned circuit wireless system."
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| − | at:1897 text:"Marconi is granted a British patent for his work, establishes the world's first radio station on the [[Isle of Wight]], England & forms the London company later to become the Marconi Wireless Telegraph Company"
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| − | at:1897 text:"Bose reports on his microwave radio experiments to the Royal Institute in London & speculates on the existence of electromagnetic radiation from the sun."
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| − | at:1898 text:"Popov effects ship-to-shore communication over a distance of 6 miles"
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| − | at:1898 text:"Tesla publicly demonstrates his remote-controlled boat containing "rotating [[coherer]]s" plus circuit elements that allowed secure communication between transmitter and receiver."
| |
| − | at:1900 text:"Popov supervises the construction of a radio station on Hogland island providing a two-way communication by wireless telegraphy between Russian navy base and crew of the battleship [[General-Admiral Apraksin]].
| |
| − | at:1900 text:"Tesla begins construction of the [[Wardenclyffe Tower]] facility for trans-Atlantic wireless telephony."
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| | | | |
| | </timeline> | | </timeline> |
