1682555

Information

• Patent Grant
• 1682555

• References
• Source

• Patent Number

  1,682,555

• Date Filed

  Not available

• Date Issued

  Tuesday, August 28, 1928
  96 years ago

• CPC

  • E21C27/14 - breaking-down effected by force or pressure applied to side of slit

• US Classifications

  • 299 - Mining or in situ disintegration of hard material