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Date |
Event(s) |
| 1 | 1904 | - 1904: Teabags invented by Thomas Suillivan.
- 1904: Benjamin Holt invents a tractor.
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| 2 | 1905 | - 1905: Albert Einstein published the Theory of Relativity and made famous the equation, E = mc2.
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| 3 | 1906 | - 1906: William Kellogg invents Cornflakes.
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| 4 | 1907 | - 1907: Color photography invented by Auguste and Louis Lumiere.
- 1907: The very first piloted helicopter was invented by Paul Cornu.
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| 5 | 1908 | - 1908: Fritz Haber invents the Haber Process for making artificial nitrates.
- 1908: J W Geiger and W Müller invent the geiger counter.
- 1908: The gyrocompass invented by Elmer A. Sperry.
- 1908: Cellophane invented by Jacques E. Brandenberger.
- 1908: Model T automobile first sold.
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| 6 | 1909 | - 1909: William Taft president of the USA 1909-1913.
- 1909: Instant coffee invented by G. Washington.
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| 7 | 1910 | - 1910: Georges Claude displayed the first neon lamp to the public on December 11, 1910, in Paris.
- 1910: Thomas Edison demonstrated the first talking motion picture.
- 1910: George V. Ruler of England 1910-1936. House of Windsor (name adopted Jul 17, 1917): 2nd son of Edward VII, married Princess Mary of Teck. Accession, Jan 20, abdication, Dec 10.
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| 8 | 1911 | - 1911: Charles Franklin Kettering invents the first automobile electrical ignition system.
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| 9 | 1912 | - 1912: Motorized movie cameras invented, and replaced hand-cranked cameras.
- 1912: The first tank patented by Australian inventor De La Mole.
- 1912: Clarence Crane created Life Savers candy in 1912.
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| 10 | 1913 | - 1913: Woodrow Wilson president of the USA 1913-1921.
- 1913: The crossword puzzle invented by Arthur Wynne.
- 1913: The Merck Chemical Company patented, what is now known as, ecstasy.
- 1913: Mary Phelps Jacob invents the bra.
- 1913: Gideon Sundback invents the modern zipper.
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| 11 | 1914 | - 1914: World War I begins. Triple Alliance: Germany, Italy, and Austria-Hungary vs. Triple Entente: Britain, France, and Russia. The United States joined on the side of the Triple Entente in 1917.
- 1914: Garrett A. Morgan invents the Morgan gas mask.
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| 12 | 1915 | - 1915: Eugene Sullivan and William Taylor co-invented Pyrex in New York City.
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| 13 | 1916 | - 1916: Radio tuners invented that received different stations.
- 1916: Stainless steel invented by Henry Brearly.
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| 14 | 1918 | - 1918: World War I ends.
- 1918: Charles Jung invented fortune cookies.
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| 15 | 1919 | - 1919: The pop-up toaster invented by Charles Strite.
- 1919: The arc welder invented.
- 1919: Short-wave radio invented.
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| 16 | 1920 | - 1920: The tommy gun patented by John T Thompson.
- 1920: The Band-Aid invented by Earle Dickson
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| 17 | 1921 | - 1921: Calvin Coolidge president of the USA 1921-1929. Calvin Coolidge, vice president under Warren Harding, sworn in as president the day after Harding dies.
- 1921: Artificial life begins -- the first robot built.
- 1921: John Larson, a University of California medical student, invented the modern lie detector (polygraph), used by police since 1924.
- 1921: Warren Harding president of the USA 1921. Warren Harding dies of an embolism in San Francisco. He had taken ill on 31 Jul 1921.
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| 18 | 1922 | - 1922: Insulin invented by Sir Frederick Grant Banting.
- 1922: The first 3-D movie (spectacles with one red and one green lens) is released.
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| 19 | 1923 | - 1923: Garrett A. Morgan invents a traffic signal.
- 1923: The television or iconoscope (cathode-ray tube) invented by Vladimir Kosma Zworykin.
- 1923: John Harwood invented the self-winding watch.
- 1923: Clarence Birdseye invents frozen food.
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1904 - 1923 (18 years)