1491512

Information

• Patent Grant
• 1491512

• References
• Source

• Patent Number

  1,491,512

• Date Filed

  Not available

• Date Issued

  Tuesday, April 22, 1924
  100 years ago

• CPC

  • B63H1/22 - the blades being foldable

• US Classifications

  • 416 - Fluid reaction surfaces
  • 440 - Marine propulsion