3709634

Information

• Patent Grant
• 3709634

• References
• Source

• Patent Number

  3,709,634

• Date Filed

  Not available

• Date Issued

  Tuesday, January 9, 1973
  52 years ago

• CPC

  • B63H1/22 - the blades being foldable

• US Classifications

  • 416 - Fluid reaction surfaces