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David Alter invented the first known American electric telegraph, in Elderton, Pennsylvania, a year before Samuel Morse's telegraph.
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Alexander Graham Bell was considered the inventor of the telephone because he was the first to patent
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Ikola Tesla and Guglielmo Marconi have been fighting for this recognition since the end of the 19th century. Many consider Nikola Tesla (1856-1943) the true inventor of the radio, although it was Guglielmo Marconi (1874-1937) who filed the patent in 1904.
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Television was invented by John Logie Baird in 1923 in Hastings, England, and the first television picture was broadcast by Baird in 1926.
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Konrad Zuse was the first to build a working computer. He did it in the living room of his parents' house in Berlin.
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Alan Kay was the first to propose something very similar to a tablet in 1968. Apple popularized them with the famous iPad
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The first mobile phone weighed more than two kilos. Martin Cooper may not be a famous name, but his invention is known to more than half of the world's population who own a cell phone.
