3140898

Information

• Patent Grant
• 3140898

• References
• Source

• Patent Number

  3,140,898

• Date Filed

  Not available

• Date Issued

  Tuesday, July 14, 1964
  60 years ago

• CPC

  • E01C23/092 - rotary

• US Classifications

  • 299 - Mining or in situ disintegration of hard material
  • 172 - Earth working