1398779

Information

• Patent Grant
• 1398779

• References
• Source

• Patent Number

  1,398,779

• Date Filed

  Not available

• Date Issued

  Tuesday, November 29, 1921
  104 years ago

• CPC

  • B23B49/005 - Attached to the drill
  • Y10T408/8729 - with work-engaging structure other than cutting edge

• US Classifications

  • 408 - Cutting by use of rotating axially moving tool