1000067

Information

• Patent Grant
• 1000067

• References
• Source

• Patent Number

  1,000,067

• Date Filed

  Not available

• Date Issued

  Tuesday, August 8, 1911
  113 years ago

• CPC

  • E21B10/445 - percussion type
  • B23B51/02 - Twist drills
  • B23B51/108 - having a centering twist drill
  • E21B10/58 - Chisel type inserts
  • B23B2251/204 - Four cutting edges
  • B23B2251/287 - Cutting edges having different lengths
  • Y10T408/906 - Axially spaced

• US Classifications

  • 408 - Cutting by use of rotating axially moving tool