Alexander Graham Bell
Bell worked at a school for deaf children . His mother and wife were both deaf.
He was working on improving the telegraph which was lines and dashes that made communications that could be sent a long way when he came up with the idea of inventing the telephone.
In 1876 he was widely credited with the invention of the first practical telephone .
By 1886 more than 15000 people owned a telephone in the U.S.A.
He died in 1922 at the age 76.
Bell would have loved to see how well phones have improved over the years .