1654223

Information

• Patent Grant
• 1654223

• References
• Source

• Patent Number

  1,654,223

• Date Filed

  Not available

• Date Issued

  Tuesday, December 27, 1927
  97 years ago

• CPC

  • E21B25/12 - of the sliding wedge type

• US Classifications

  • 175 - Boring or penetrating the earth