Individual #Lee_De_Forest__De_Forest__The_Father_of_Radio  United States electrical engineer who in 1907 patented the first triode vacuum tube, which made it possible to detect and amplify radio waves (1873-1961)
  type:  #electrical_engineer  a person trained in practical applications of the theory of electricity
  type:  #inventor__discoverer__artificer  someone who is the first to think of or make something

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