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7 mar 1876 año - Bell patents his ideas

Descripción:

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.

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Alexander Graham Bell

ByAlicia Gracidas-Guldan
20 dic 2018
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fecha:

7 mar 1876 año
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~ 149 years ago
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