2636722

Information

• Patent Grant
• 2636722

• References
• Source

• Patent Number

  2,636,722

• Date Filed

  Not available

• Date Issued

  Tuesday, April 28, 1953
  71 years ago

• CPC

  • E21C27/122 - with breaking-down members having a striking action

• US Classifications

  • 299 - Mining or in situ disintegration of hard material