1644787

Information

• Patent Grant
• 1644787

• References
• Source

• Patent Number

  1,644,787

• Date Filed

  Not available

• Date Issued

  Tuesday, October 11, 1927
  97 years ago

• CPC

  • B64C11/007 - Propulsive discs
  • B64C2700/6281 - Helicopters

• US Classifications

  • 244 - Aeronautics and astronautics