2658290

Information

• Patent Grant
• 2658290

• References
• Source

• Patent Number

  2,658,290

• Date Filed

  Not available

• Date Issued

  Tuesday, November 10, 1953
  71 years ago

• CPC

  • E21C49/02 - by excavating

• US Classifications

  • 037 - Excavating
  • 044 - Fuel and related compositions
  • 172 - Earth working
  • 241 - Solid material comminution or disintegration