United States Communication: Invention of telephone. (17 фев 1876 г. – 4 авг 1876 г.)
Описание:
Alexander Graham Bell invented the telephone at the nation's centennial exposition in Philidelphia in 1876. By 1915, the telephone wires connected Americans from coast to coast.Добавлено на ленту времени:
Дата:
17 фев 1876 г.
4 авг 1876 г.
~ 5 months and 19 days