1612066

Information

• Patent Grant
• 1612066

• References
• Source

• Patent Number

  1,612,066

• Date Filed

  Not available

• Date Issued

  Tuesday, December 28, 1926
  98 years ago

• CPC

  • E21C31/025 - by another slitting or extracting member

• US Classifications

  • 299 - Mining or in situ disintegration of hard material