30 Dez 1875 Jahr - the tel

Beschreibung:

On March 7, 1876, 29-year-old Alexander Graham Bell receives a patent for his revolutionary new invention: the telephone. The Scottish-born Bell worked in London with his father, Melville Bell, who developed Visible Speech, a written system used to teach speaking to the deaf.

https://www.youtube.com/watch?v=j3RbnsHTuVw

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