2554820

Information

• Patent Grant
• 2554820

• References
• Source

• Patent Number

  2,554,820

• Date Filed

  Not available

• Date Issued

  Tuesday, May 29, 1951
  73 years ago

• CPC

  • E21B10/44 - Bits with helical conveying portion
  • Y10T279/17854 - Longitudinal clamping wedge

• US Classifications

  • 279 - Chucks or sockets
  • 175 - Boring or penetrating the earth