TELEFONO DE A.G. BELL

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Volviendo a la fecha de hoy, un 7 de marzo de 1876 Bell obtuvo la patente por uno de sus inventos que más ha contribuido al desarrollo de nuestra civilización.
Aquí un extracto del texto: PATENT NUMBER 174,465 As Bell raced to perfect his telephone, he was also writing up specifications to be filed with the United States Patent Office in Washington. On March 7, 1876, he was issued patent number 174,465.