2628821

Information

• Patent Grant
• 2628821

• References
• Source

• Patent Number

  2,628,821

• Date Filed

  Not available

• Date Issued

  Tuesday, February 17, 1953
  71 years ago

• CPC

  • E21B10/58 - Chisel type inserts
  • Y10T279/17846 - Single transverse bolt

• US Classifications

  • 279 - Chucks or sockets
  • 037 - Excavating
  • 175 - Boring or penetrating the earth
  • D15 - Machines not elsewhere specified