| |
Year |
Event(s) |
| 1 | 1920 | - The Band-Aid invented by Earle Dickson
- The tommy gun patented by John T Thompson.
|
| 2 | 1921 | - Artificial life begins -- the first robot built.
- Calvin Coolidge president of the USA 1921-1929. Calvin Coolidge, vice president under Warren Harding, sworn in as president the day after Harding dies.
- John Larson, a University of California medical student, invented the modern lie detector (polygraph), used by police since 1924.
- Warren Harding president of the USA 1921. Warren Harding dies of an embolism in San Francisco. He had taken ill on 31 Jul 1921.
|
| 3 | 1922 | - Insulin invented by Sir Frederick Grant Banting.
- The first 3-D movie (spectacles with one red and one green lens) is released.
|
| 4 | 1923 | - Clarence Birdseye invents frozen food.
- Garrett A. Morgan invents a traffic signal.
- John Harwood invented the self-winding watch.
- The television or iconoscope (cathode-ray tube) invented by Vladimir Kosma Zworykin.
|
| 5 | 1924 | - Notebooks with spiral bindings invented.
- The dynamic loudspeaker invented by Rice and Kellogg.
|
| 6 | 1925 | - The mechanical television a precursor to the modern television, invented by John Logie Baird.
|
| 7 | 1926 | - Robert H. Goddard invents liquid-fueled rockets.
|
| 8 | 1927 | - Erik Rotheim patents an aerosol can.
- JWA Morrison invents the first quartz crystal watch.
- Philip Drinker invents the iron lung.
- Philo Taylor Farnsworth invents a complete electronic TV system.
- Technicolor invented.
- Warren Marrison developed the first quartz clock.
|
| 9 | 1928 | - Bubble gum invented by Walter E. Diemer.
- Jacob Schick patented the electric shaver.
- Scottish biologist Alexander Fleming discovers penicillin.
|
| 10 | 1929 | - American, Paul Galvin invents the car radio.
- Herbert Hoover president of the USA 1929-1933.
- Yo-Yo re-invented as an American fad.
|
| 11 | 1930 | - Frank Whittle and Dr Hans von Ohain both invent a jet engine.
- Scotch tape patented by 3M engineer Richard G. Drew.
- The "differential analyzer", or analog computer invented by Vannevar Bush at MIT in Boston.
|
| 12 | 1931 | - Germans Max Knott and Ernst Ruska co-invent the electron microscope.
- Harold Edgerton invented stop-action photography.
|
| 13 | 1932 | - Polaroid photography invented by Edwin Herbert Land.
|
| 14 | 1933 | - Franklin Roosevelt president of the USA 1933-1945.
- Frequency modulation (FM radio) invented by Edwin Howard Armstrong.
- Stereo records invented.
|
| 15 | 1934 | - Charles Darrow claims he invented the game Monopoly.
- Joseph Begun invents the first tape recorder for broadcasting - first magnetic recording.
|
| 16 | 1935 | - The first canned beer made.
- Wallace Carothers and DuPont Labs invents nylon (polymer 6.6.).
|
| 17 | 1936 | - Bell Labs invents the voice recognition machine.
- Edward VIII. Ruler of England 1936. House of Windsor (name adopted Jul 17, 1917): Eldest son of George V.
- George VI. Ruler of England 1936-1952. House of Windsor (name adopted Jul 17, 1917): 2nd son of George V, Duke of York; married Lady Elizabeth Bowes-Lyon.
- Samuel Colt patents the Colt revolver.
|
| 18 | 1937 | - Chester F. Carlson invents the photocopier.
|
| 19 | 1938 | - Nescafe or freeze-dried coffee invented.
- Roy J. Plunkett invented tetrafluoroethylene polymers or Teflon.
- The ballpoint pen invented by Ladislo Biro.
|
| 20 | 1939 | - Igor Sikorsky invents the first successful helicopter.
- World War II begins. Axis Powers: Germany, Italy, Japan vs. Major Allied Powers: United States, Great Britain, France, and Russia. 1939-1945.
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