2755077

Information

• Patent Grant
• 2755077

• References
• Source

• Patent Number

  2,755,077

• Date Filed

  Not available

• Date Issued

  Tuesday, July 17, 1956
  68 years ago

• CPC

  • E21C25/26 - with curved jibs only

• US Classifications

  • 299 - Mining or in situ disintegration of hard material