3554604

Information

• Patent Grant
• 3554604

• References
• Source

• Patent Number

  3,554,604

• Date Filed

  Not available

• Date Issued

  Tuesday, January 12, 1971
  53 years ago

• CPC

  • E21D9/1046 - Vibrating

• US Classifications

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