Помогите ответить на вопрос: When was it invented? (telephone)

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Помогите ответить на вопрос: When was it invented? (telephone)

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patented in the US in 1876 Alexander Bell, called "speaking telegraph". Handset Bell served on the queue for transmission and reception of human speech. The phone A. Bell was not the call, he was later invented colleague A. Bell - T. Watson (1878)