1518347

Information

• Patent Grant
• 1518347

• References
• Source

• Patent Number

  1,518,347

• Date Filed

  Not available

• Date Issued

  Tuesday, December 9, 1924
  100 years ago

• CPC

  • E21C3/04 - Hammer drilling machines in which the tool is hit by an impulse member
  • E21C1/10 - with a built-in feeding device

• US Classifications

  • 173 - Tool driving or impacting