2687681

Information

• Patent Grant
• 2687681

• References
• Source

• Patent Number

  2,687,681

• Date Filed

  Not available

• Date Issued

  Tuesday, August 31, 1954
  69 years ago

• CPC

  • A01B3/44 - with parallel plough units used alternately
  • A01B35/08 - with rigid tools

• US Classifications

  • 172 - Earth working