321144

Information

• Patent Grant
• 321144

• References
• Source

• Patent Number

  321,144

• Date Filed

  Not available

• Date Issued

  Tuesday, June 30, 1885
  140 years ago

• CPC

  • B23B51/02 - Twist drills
  • Y10T408/898 - Helical ribbon Tool

• US Classifications

  • 408 - Cutting by use of rotating axially moving tool
  • 175 - Boring or penetrating the earth