1544691

Information

• Patent Grant
• 1544691

• References
• Source

• Patent Number

  1,544,691

• Date Filed

  Not available

• Date Issued

  Tuesday, July 7, 1925
  99 years ago

• CPC

  • E21B10/36 - Percussion drill bits
  • B23B2251/46 - Drills having a centre free from cutting edges or with recessed cutting edges
  • Y10T403/7016 - Diametric end slot is joint component
  • Y10T403/7073 - Peripheral enlargement, depression, or slot on one member is joint component
  • Y10T403/7094 - Enlarged head in complementary recess, e.g., dovetail, etc.

• US Classifications

  • 175 - Boring or penetrating the earth
  • 403 - Joints and connections