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David Nelson Crosthwait Jr.

  • A very inteligent Afrrican American that invented air conditioning, and heating systems.
  • Born:1898
  • Died:1976
  • Born:Nashvile,Tn
  • Parents:David Nelson and Minnie Crosthwait
  • He attended Purdue University
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Q: Who is the family of David Nelson Crosthwait Jr?
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