3388753

Information

• Patent Grant
• 3388753

• References
• Source

• Patent Number

  3,388,753

• Date Filed

  Not available

• Date Issued

  Tuesday, June 18, 1968
  56 years ago

• CPC

  • E21B4/08 - impact being obtained by gravity only

• US Classifications

  • 173 - Tool driving or impacting
  • 404 - Road structure, process, or apparatus