1439677

Information

• Patent Grant
• 1439677

• References
• Source

• Patent Number

  1,439,677

• Date Filed

  Not available

• Date Issued

  Tuesday, December 19, 1922
  101 years ago

• CPC

  • E21C29/08 - Anchoring arrangements

• US Classifications

  • 248 - Supports
  • 254 - Implements or apparatus for applying pushing or pulling force
  • 299 - Mining or in situ disintegration of hard material