2471616

Information

• Patent Grant
• 2471616

• References
• Source

• Patent Number

  2,471,616

• Date Filed

  Not available

• Date Issued

  Tuesday, May 31, 1949
  75 years ago

• CPC

  • E21B25/14 - mounted on pivot transverse to core axis

• US Classifications

  • 175 - Boring or penetrating the earth