1 janv. 1876 - Telephone
Description:
During the 1870's, two well known inventors both independently designed devices that could transmit sound along electrical cables. Those inventors were Alexander Graham Bell and Elisha Gray.Exposure: Modern telephone models used for calling loved ones ad friends.
Ajouté au bande de temps:
Date:
1 janv. 1876
Maintenaint
~ Il y a 149 ans