2575438

Information

• Patent Grant
• 2575438

• References
• Source

• Patent Number

  2,575,438

• Date Filed

  Not available

• Date Issued

  Tuesday, November 20, 1951
  73 years ago

• CPC

  • E21B10/58 - Chisel type inserts
  • Y10T279/17837 - Plural bolt

• US Classifications

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