Prosperity and Innovation

Inventions of the 1920s Timeline:

1920

• The Band-Aid
• Tommy Gun

1921

• Lie detector

1922

• Insulin
• The first 3D Movie is released

1923

• Frozen food
• Self-winding watch
• The traffic signal

1924

• Spiral Notebooks
• Loudspeaker

1925

• The mechanical television (pre-television, television)

1926

• Liquid-fueled rocket

1927

• Crystal quartz watch
• PEZ
• Technicolor
• Electronic television
• Iron Lung

1928

• Discovery of penicillin
• Electric shaver
• Bubble gum

1929

• Car radio