Inventions of the 1920's

Automobile with the Combustion Engine

Jul 30, 1920

Henry Ford built his empire on this invention. He created an assembly where each worker focused on one thing. This made it easy to build and sell.

"Tommy Gun"

Aug 15, 1920

The tommy gun was patented by John Thompson. This was favored by many at the time for its compactness and versatility.

Traffic Light

Dec 2, 1920

Garrett Morgan first invented the traffic light anf officer William Potts put it to work in the 1920s. The first colors were green, amber, and red

Insulin

Jul 30, 1921

Fredrick Banting and Charles Best discover insulin. They first started testing on dogs and realized that the insulin injected into the diabetic dog brought his glucose level down to normal.

Bulldozer

Apr 15, 1923

Engineer Benjamin Holt invents the bulldozer!

Frozen Food

Oct 14, 1923

Clarence Birdseye invents frozen food by flash freezing them under high pressure. He turned his $7 investment into his $22 million industry.

Liquid-Fueled Rockets

Mar 16, 1926

The first liquid fueled rockets were launched in Auburn, Massachusetts. The scientist and inventor Robert Goddard created the this rocket.

Aerosol Can

Jan 22, 1927

Erik Rotheim patents the aerosol can. This proved to be very beneficial today because of the many products that use pressurized cans to pack chemicals.

Bubble Gum

Mar 14, 1928

Walter E. Diemer invented bubble gum and perfected the formula in his free time. Pink was the only dye available so it became the standard.

Radio

Oct 14, 1929

The first radio is invented and was a huge success because it connected people from different areas and people could be updated on events.