3811642

Information

• Patent Grant
• 3811642

• References
• Source

• Patent Number

  3,811,642

• Date Filed

  Not available

• Date Issued

  Tuesday, May 21, 1974
  50 years ago

• CPC

  • B64C11/28 - Collapsible or foldable blades
  • B64C31/04 - Man-powered aircraft

• US Classifications

  • 244 - Aeronautics and astronautics
  • 416 - Fluid reaction surfaces