2911909

Information

• Patent Grant
• 2911909

• References
• Source

• Patent Number

  2,911,909

• Date Filed

  Not available

• Date Issued

  Tuesday, November 10, 1959
  65 years ago

• CPC

  • E21B31/1075 - using explosives
  • Y10T29/49822 - by applying force

• US Classifications

  • 166 - Wells
  • 029 - Metal working
  • 175 - Boring or penetrating the earth