2201159

Information

• Patent Grant
• 2201159

• References
• Source

• Patent Number

  2,201,159

• Date Filed

  Not available

• Date Issued

  Tuesday, May 21, 1940
  84 years ago

• CPC

  • B23B51/02 - Twist drills
  • E21B10/445 - percussion type
  • B23B2251/18 - Configuration of the drill point
  • B23B2251/241 - Cross sections of the diameter of the drill
  • B23B2251/406 - of special form not otherwise provided for
  • B23B2251/46 - Drills having a centre free from cutting edges or with recessed cutting edges
  • B23B2251/48 - Chip breakers
  • B23B2260/072 - Grooves

• US Classifications

  • 175 - Boring or penetrating the earth
  • 076 - Metal tools and implements, making