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7 март 1876 г. - Bell patents his ideas

Описание:

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.

Добавлено на ленту времени:

Alexander Graham Bell

ByAlicia Gracidas-Guldan
20 дек 2018
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0
532

Дата:

7 март 1876 г.
Сейчас
~ 149 г назад
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