What year were Alexander graham bell's invented?

Alexander Graham "Bell" is his name. The term "bell" is his last name. March 10, 1876, in Boston, apparatus produced by Alexander Graham Bell, called vibraphone, succeeded for the first time remotely transmitting the voice of its inventor, This was the first time human speech, which could be understood was heard over the telephone when Bell called to Watson, "Mr. Watson, Come here, I want to see you."