1698343

Information

• Patent Grant
• 1698343

• References
• Source

• Patent Number

  1,698,343

• Date Filed

  Not available

• Date Issued

  Tuesday, January 8, 1929
  96 years ago

• CPC

  • E21B21/012 - using exhaust air from the drilling motor for blowing off the dust at the borehole entrance

• US Classifications

  • 173 - Tool driving or impacting
  • 175 - Boring or penetrating the earth