1931590

Information

• Patent Grant
• 1931590

• References
• Source

• Patent Number

  1,931,590

• Date Filed

  Not available

• Date Issued

  Tuesday, October 24, 1933
  91 years ago

• CPC

  • E21B10/62 - characterised by parts
  • Y10T279/17905 - Bottomless
  • Y10T279/17923 - Transverse pin

• US Classifications

  • 279 - Chucks or sockets