3621785

Information

• Patent Grant
• 3621785

• References
• Source

• Patent Number

  3,621,785

• Date Filed

  Not available

• Date Issued

  Tuesday, November 23, 1971
  53 years ago

• CPC

  • E01B27/021 - by devices moving underneath the track
  • E01B27/028 - Compacting ballasting material; Performing ballast cores or seats for sleepers

• US Classifications

  • 104 - Railways
  • 037 - Excavating