1388642

Information

• Patent Grant
• 1388642

• References
• Source

• Patent Number

  1,388,642

• Date Filed

  Not available

• Date Issued

  Tuesday, August 23, 1921
  103 years ago

• CPC

  • B64C27/00 - Rotorcraft Rotors peculiar thereto
  • B64C2700/6277 - with driven or windmilling propellers

• US Classifications

  • 244 - Aeronautics and astronautics