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14 feb 1876 anni - Téléphone Alexander Graham Bell

Descrizione:

Le 14 février 1876, l'Américain d'origine anglaise Alexander Graham Bell dépose un brevet pour un système de transmission de la voix. Quelques heures plus tard, son compatriote Elisha Gray fait de même.

Aggiunto al nastro di tempo:

Life

ByJohn Lev
21 ott 2017
0
0
579

Data:

14 feb 1876 anni
Adesso
~ 149 years ago
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