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Dorthy GRASELA, [child]
 1929 - 1933

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Timeline

1929
1930
1931
1931
1932
1933


 
 
 




   Year  Event(s)
1 1929 
  • American, Paul Galvin invents the car radio.
  • Herbert Hoover president of the USA 1929-1933.
  • Yo-Yo re-invented as an American fad.
2 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.
3 1931 
  • Germans Max Knott and Ernst Ruska co-invent the electron microscope.
  • Harold Edgerton invented stop-action photography.
4 1932 
  • Polaroid photography invented by Edwin Herbert Land.
5 1933 
  • Franklin Roosevelt president of the USA 1933-1945.
  • Frequency modulation (FM radio) invented by Edwin Howard Armstrong.
  • Stereo records invented.
  
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