1822711

Information

• Patent Grant
• 1822711

• References
• Source

• Patent Number

  1,822,711

• Date Filed

  Not available

• Date Issued

  Tuesday, September 8, 1931
  93 years ago

• CPC

  • A01B13/025 - with passively driven rotating disc-like elements for forming the ridge

• US Classifications

  • 172 - Earth working