1740821

Information

• Patent Grant
• 1740821

• References
• Source

• Patent Number

  1,740,821

• Date Filed

  Not available

• Date Issued

  Tuesday, December 24, 1929
  94 years ago

• CPC

  • E21B43/121 - Lifting well fluids
  • F04B19/16 - Adhesion-type liquid-lifting devices

• US Classifications

  • 198 - Conveyors: power-driven