2426591

Information

• Patent Grant
• 2426591

• References
• Source

• Patent Number

  2,426,591

• Date Filed

  Not available

• Date Issued

  Tuesday, September 2, 1947
  77 years ago

• CPC

  • E21D1/04 - with grabs
  • E21D1/00 - Sinking shafts

• US Classifications

  • 414 - Material or article handling
  • 037 - Excavating
  • 299 - Mining or in situ disintegration of hard material