2661642

Information

• Patent Grant
• 2661642

• References
• Source

• Patent Number

  2,661,642

• Date Filed

  Not available

• Date Issued

  Tuesday, December 8, 1953
  71 years ago

• CPC

  • B23B51/108 - having a centering twist drill
  • Y10T408/8725 - including means to permit relative axial positioning of edges
  • Y10T408/8923 - Removable central lead

• US Classifications

  • 408 - Cutting by use of rotating axially moving tool
  • 033 - Geometrical instruments