Alexander Graham Bell (1847-1922) Schottischer us-amerikanischer Erfinder; patentierte Telefon 1876; Bell Einweihung 1520 km Telefon Verbindung zwischen New York und Chicago, 18. Oktober 1892. Gravur veröffentlicht Paris 1892 Stockfotografie - Alamy
Alexander Graham Bell – Wikipedia
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Alexander Graham Bell – Wikipedia
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Biography of Alexander Graham Bell, Inventor
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Alexander Graham Bell – Wikipedia
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