2827263

Information

• Patent Grant
• 2827263

• References
• Source

• Patent Number

  2,827,263

• Date Filed

  Not available

• Date Issued

  Tuesday, March 18, 1958
  66 years ago

• CPC

  • E21B4/12 - Electrically operated hammers

• US Classifications

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