1331997

Information

• Patent Grant
• 1331997

• References
• Source

• Patent Number

  1,331,997

• Date Filed

  Not available

• Date Issued

  Tuesday, February 24, 1920
  105 years ago

• CPC

  • B64C11/007 - Propulsive discs
  • B60B1/08 - formed by casting

• US Classifications

  • 416 - Fluid reaction surfaces
  • 415 - Rotary kinetic fluid motors or pumps