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