who invented the first telephone and when was it invented
Invention of the telephone An early voice communicating device was invented around 1854 by Antonio Meucci, who called it a telettrofono. In 1871 Meucci filed a caveat at the US Patent Office[citation needed]. His caveat describes his invention, but does not mention a diaphragm, electromagnet, conversion of sound into electrical waves, conversion of electrical waves into sound, or other essential features of an electromagnetic telephone.