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7 marzo 1876 anni - Bell patents his ideas

Descrizione:

Bell receives The U.S. Patent Office patent number 174,465. It allowed him to have his machine transmit sound waves telegraphically without others copying his ideas.

Aggiunto al nastro di tempo:

Alexander Graham Bell

ByAlicia Gracidas-Guldan
20 dic 2018
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0
532

Data:

7 marzo 1876 anni
Adesso
~ 149 years ago
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