1920's Technology

Events

Band-Aid

1920

The Band-Aid was invented by Earl Dickson, because his wife was cutting herself.

Traffic Light

1920

William Potts a police officer invented the traffic light and used the colors red, amber and green.

Bulldozer

1923

James Cummings invented the bulldozer which looked like a tractor on treads.

Liquid Rocket

1926

The liquid fueled rocket was invented by Robert Hutchings Goddard as an armed weapon.

Juke Box

1927

The was invented by the Automatic music company and was popular in the 1930s.

Ice Trays

1928

The ice tray was invented by Loyd Groff Copeman and the new type of ice was more popular than crushed ice.

Sunglasses

1929

Sam Foster Grant started producing sunglasses in the United States.