Inventions of the 1920s

1920s

Period: Jan 1, 1920 to Dec 31, 1929

Band-Aid

Sep 25, 1920

Created by Earl Dickson

Robot

Feb 25, 1921

The first robot was built in this year, leading to the first atificial life.

Lie Detector

Sep 25, 1921

created by John Larson

Insulin

May 25, 1922

created by Sir Frederick Grant Banting

3-D

Sep 25, 1922

The first 3-D movie was released in this year.

Traffic Signal

Sep 25, 1923

Garret A. Morgan Create dthe first traffic signal which was a railroad sign

Loudspeaker

Sep 25, 1924

The dynamic loudspeaker invented by Rice and Kellogg.

The Mechanical Television

Sep 25, 1925

The mechanical television a precursor to the modern television, invented by John Logie Baird.

Liquid-fueled Rockets

Sep 25, 1926

Robert H. Goddard invents liquid-fueled rockets.

Iron Lung

Sep 25, 1927

Philip Drinker was the inventor of the iron lung in 1927.

Penicilin

Sep 25, 1928

Penicilin was discovered by Scottish biologist Alexander Fleming