PLTW-History of the phone

By edwardramirez11
  • First phone

    First phone

    Alexander Graham made the first phone with a transmitter, magnet, a reciever.
  • Rotary

    Rotary

    Almon B.Strowger made the rotary.It was made out a rotary dial, a handset cradle, switch hook,and a handset wired to the base.
  • Portable phones

    Portable phones

    Matin Cooper, a morto made the first