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2009/2010. Pascal Mouchard. 2. Les grandes dates du t?l?phone. 1792 Invention du t?l?graphe Optique par Claude Chappe1837 Invention du t?l?graphe ?lectrique par Charles Wheatstone1876 Mise au point du t?l?phone par Alexander Graham Bell 1892 Invention du T?l?phone automatique par Almon Strowger

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