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| 1838 |
| | | US inventor Samuel Morse gives the first public demonstration, in Philadelphia, of his electric telegraph | |
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| 1840 |
| | | Rowland Hill introduces in Britain the world's first postage stamps - the Penny Black and Two Pence Blue | |
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| 1844 |
| | | Samuel Morse and his assistant Alfred Vail complete the first telegraph line, between New York and Baltimore | |
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| 1858 |
| | | US entrepreneur Cyrus W. Field succeeds in laying a telegraph cable across the Atlantic, but it fails after only a month | |
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| 1870 |
| | | Adelaide and Darwin are linked across the entire Australian continent by the Overland Telegraph Line | |
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| 1871 |
| | | Italian US immigrant Antonio Meucci files a patent in New York for the invention of the telephone | |
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| 1876 |
| | | Alexander Graham Bell makes the first practical use of his telephone, summoning his assistant from another room with the words 'Mr Watson, come here. I want to see you.' | |
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| 1876 |
| | | Alexander Graham Bell demonstrates his new invention, the telephone, at the US Centennial Exhibition in Philadelphia | |
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| 1895 |
| | | 21-year-old Guglielmo Marconi succeeds in transmitting a radio signal more than a mile at his home near Bologna | |
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| 1896 |
| | | 22-year-old Guglielmo Marconi takes out a patent in Britain for the invention of radio | |
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