1741112

Information

• Patent Grant
• 1741112

• References
• Source

• Patent Number

  1,741,112

• Date Filed

  Not available

• Date Issued

  Tuesday, December 24, 1929
  96 years ago

• CPC

  • E21C25/24 - with flat jibs only

• US Classifications

  • 299 - Mining or in situ disintegration of hard material