24 März 1847 Jahr - Alexander Bell The Telephone

Beschreibung:

Alexander Graham Bell is known for inventing the telephone. He came to the U.S as a teacher of the deaf. While visiting his mother he came up with the idea of 'electronic speech' which leater led him to invent the microphone and telephone.

https://www.pbs.org/transistor/album1/addlbios/bellag.html

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