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 Edwin Howard Armstrong

New York 18.December.1890   New York 01.February.1954
 
   
Brief biographical history 
1890 Born in New York on December 18 His mother, Emily Smith Armstrong, had been a teacher in the public schools and his father, John Armstrong, was vice president of the United States branch of the Oxford University Press. (1)

  
1912 Received graduate degree in electrical engineering from Columbia University.
 
1914 Patent  the Circuit regeneration or receiver reaction

 
1917 Military service in Paris
September 10 is promoted to the rank of captain

 
1918 Promoted to Major of the USA

 
1919 He teaches at the School of Engineering of Columbia University

 
1923 Armstrong marries the secretary of David Sarnoff, Marion Mac Innis, December 1, 1923.

 
1933 Patent system Fm radio (frequency modulation)

 
1954  February 1 dies suicide.
   

note : 1) fonts :http://www.smart90.com/armstrong