2816747

Information

• Patent Grant
• 2816747

• References
• Source

• Patent Number

  2,816,747

• Date Filed

  Not available

• Date Issued

  Tuesday, December 17, 1957
  67 years ago

• CPC

  • E21C29/04 - by cable or chains

• US Classifications

  • 299 - Mining or in situ disintegration of hard material