1021822

Information

• Patent Grant
• 1021822

• References
• Source

• Patent Number

  1,021,822

• Date Filed

  Not available

• Date Issued

  Tuesday, April 2, 1912
  112 years ago

• CPC

  • B63H1/14 - Propellers
  • B63H2001/145 - comprising blades of two or more different types

• US Classifications

  • 416 - Fluid reaction surfaces