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Harold Edgerton invented the high-speed photography Jul 30, 1931

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Vannevar Bush at MIT in Boston was the inventor of the differential analyzer. Feb 24, 1930

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Edwin H. Armstrong invented FM radio on May 26, 1933

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Germans Max Knott and Ernst Ruska co-invented the electron mircroscope on .Mar 31, 1931

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Harold Edgerton invented the stop-action photography Aug 4, 1931

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The production of the electric razor. Jacob Schick's invention helped people by making shaving go faster.
Nov 21, 1931

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The photocopier, copy machine, was invented by Chester Carlson. Aug 24, 1938

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Sir Frank Whittle was the inventor of the jet engine. It made the jets go faster than the normal speed of a jet. Jun 25, 1937

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It was invented by Henry Ford.The automoblie with the combustion was the most popular invention in the 1920s.

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It was invented by Henry Ford.The automoblie with the combustion was the most popular invention in the 1920s.

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on uly 30th

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The bread slicer was invented by Otto Frederick Rowedder he lived in Iowa he worked on it every since 1912 but was finally invented on July 24th 1927

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John A. Larson was the inventor of the lie detector test on June 22nd 1921

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The traffic light was invented by police officer William Potts on May 5th 1920

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The traffic light was invented by police officer William Potts on May 5th 1920

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on March 6th 1920 Leo Gerstenzang  took his wifes invention and put it on the market.

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on March 6th 1920 Leo Gerstenzang  took his wifes invention and put it on the market.

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The Bulldozer was invented by Engineer Benjamin Holt on April 15th 1923

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The Band-Aid was invented on October 10th 1920 by Thomas Anderson 

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The Band-Aid was invented on October 10th 1920 by Thomas Anderson 

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Kool Aid was invented on June 21st 1927 by a man named Edwin Perkins

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Kool Aid was invented on June 21st 1927 by a man named Edwin Perkins

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Photo essay
(Invetions)