1800094

Information

• Patent Grant
• 1800094

• References
• Source

• Patent Number

  1,800,094

• Date Filed

  Not available

• Date Issued

  Tuesday, April 7, 1931
  93 years ago

• CPC

  • B64D35/06 - the propellers or rotors being counter-rotating
  • B64D2700/62824 - co-rotating
  • Y10T74/19121 - Concentric

• US Classifications

  • 074 - Machine element or mechanism
  • 416 - Fluid reaction surfaces