1477932

Information

• Patent Grant
• 1477932

• References
• Source

• Patent Number

  1,477,932

• Date Filed

  Not available

• Date Issued

  Tuesday, December 18, 1923
  100 years ago

• CPC

  • E21B10/00 - Drill bits
  • E21B10/02 - Core bits
  • Y10T279/17948 - Threaded sleeve

• US Classifications

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