1820366

Information

• Patent Grant
• 1820366

• References
• Source

• Patent Number

  1,820,366

• Date Filed

  Not available

• Date Issued

  Tuesday, August 25, 1931
  93 years ago

• CPC

  • E21C47/10 - for quarrying stone, sand, gravel, or clay

• US Classifications

  • 037 - Excavating
  • 198 - Conveyors: power-driven