Sir John Ambrose Fleming & The History of the Telephone
At the age of 77, Fleming retired
At the age of 77, Fleming retired. But in 1933 he was awarded the IRE Medal of Honor for "the conspicuous part he played in introducing physical and engineering principles into the radio art." Modern day telephone answering service and radio communications have roots with some great minds and their inventions including Fleming and his introduction of the Vacuum tube.
Sir John Ambrose Fleming & The History of the Telephone