3695721

Information

• Patent Grant
• 3695721

• References
• Source

• Patent Number

  3,695,721

• Date Filed

  Not available

• Date Issued

  Tuesday, October 3, 1972
  52 years ago

• CPC

  • E21D9/1046 - Vibrating
  • Y10S37/904 - Vibration means for excavating tool

• US Classifications

  • 299 - Mining or in situ disintegration of hard material
  • 037 - Excavating
  • 172 - Earth working
  • 173 - Tool driving or impacting