3137018

Information

• Patent Grant
• 3137018

• References
• Source

• Patent Number

  3,137,018

• Date Filed

  Not available

• Date Issued

  Tuesday, June 16, 1964
  60 years ago

• CPC

  • E01B27/023 - Spreading, levelling or redistributing ballast already placed

• US Classifications

  • 015 - Brushing, scrubbing, and general cleaning