Traffic light

U.S. History II

By sena_carroll

  • Radio Station

    Radio Station
    The first radio station was was KDKA.

  • Band-aid

    Band-aid
    Earle Dickson invented the first band-aid.

  • Traffic Signal

    Traffic Signal
    After he seen two vehicles crash into each other Garret Morgan invented the traffic signal.

  • Bulldozer

    Bulldozer
    James Cummings and a draftsman named J. Earl McLeod made the first designs for the bulldozer.

  • Camera

    Camera
    Samuel Shlafrock invented the first instant camera.

  • Liquid Fueled Rocket

    Liquid Fueled Rocket
    Robert Goddard invented the Liquid Fueled Rocket.

  • Ford Model T

    Ford Model T
    Was the first car invented in the 1920s.

  • Penicillin

    Penicillin
    Alexander Fleming discovered penicillin. It helped cure sickness.

  • Bread slicer

    Bread slicer
    Otto Rohwedder invented the bread slicer.

  • Television broadcast

    Television broadcast
    The Queen's Messenger was the first live drama on television.