On This Day in Telephone History August 22ND 1917 Communication between two airplanes in flight was Demonstrated informally at Langley Field, Virginia for U. S. Government authorities.

On This Day in Telephone History August 22ND 1917

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On This Day in Telephone History August 22ND 1917 Communication between Two Airplanes in Flight was Demonstrated informally at Langley Field, VA for U. S. Government authorities.

  • July 2ND – one-way air to ground radiotelephone transmission
  • July 4TH – one-way ground to air radiotelephone transmission
  • August 18TH – Two-way air-ground communication maintained for first time
  • August 20TH – First communication between two airplanes in flight