1389471

Information

• Patent Grant
• 1389471

• References
• Source

• Patent Number

  1,389,471

• Date Filed

  Not available

• Date Issued

  Tuesday, August 30, 1921
  103 years ago

• CPC

  • B64D35/04 - characterised by the transmission driving a plurality of propellers or rotors
  • B64D2700/62807 - Several non-coaxial propellers driven by only one engine

• US Classifications

  • 244 - Aeronautics and astronautics