3579873

Information

• Patent Grant
• 3579873

• References
• Source

• Patent Number

  3,579,873

• Date Filed

  Not available

• Date Issued

  Tuesday, May 25, 1971
  53 years ago

• CPC

  • E01B27/027 - Loosening ballasting material
  • E01B27/023 - Spreading, levelling or redistributing ballast already placed

• US Classifications

  • 037 - Excavating
  • 172 - Earth working