3469886

Information

• Patent Grant
• 3469886

• References
• Source

• Patent Number

  3,469,886

• Date Filed

  Not available

• Date Issued

  Tuesday, September 30, 1969
  55 years ago

• CPC

  • E21C31/08 - for adjusting parts of the machines

• US Classifications

  • 299 - Mining or in situ disintegration of hard material
  • 175 - Boring or penetrating the earth