3021621

Information

• Patent Grant
• 3021621

• References
• Source

• Patent Number

  3,021,621

• Date Filed

  Not available

• Date Issued

  Tuesday, February 20, 1962
  63 years ago

• CPC

  • A01B13/00 - Ploughs or like machines for special purposes; Ditch diggers, trench ploughs, forestry ploughs, ploughs for land or marsh reclamation
  • A01B33/04 - with tools on horizontal shaft parallel to direction of travel
  • E02F3/186 - with the axis being substantially parallel to the direction of travel
  • E02F3/20 - with tools that only loosen the material

• US Classifications

  • 037 - Excavating
  • 172 - Earth working