1920's

By Rhyan
  • Period: to

    1920's

  • Tommy Gun

    Tommy Gun
    Invented by John T. Thompson.

  • Lie Detector

    Lie Detector
    Invented by John Larson, he was also the first person to use the machine in criminal investigations

  • Insulin

    Insulin
    Invented by Fredrick Banting

  • Traffic Signal

    Traffic Signal
    Invented and patented by Garrett Morgan

  • Self Winding Watch

    Self Winding Watch
    Invented by John Hardwood

  • Frozen Food

    Frozen Food
    Invented by Clarence Birdseye

  • Aersol Can

    Aersol Can
    Invented by Erik Rotheim, a Norwegian chemical engineer.

  • Liquid Fuel Rockets

    Liquid Fuel Rockets
    Invented by Robert Goddard

  • Complete Electronic TV System

    Complete Electronic TV System
    Invented by Philo Farnsworth

  • Electric Shaver

    Electric Shaver
    Invented by Jacob Schick