420189

Information

• Patent Grant
• 420189

• References
• Source

• Patent Number

  420,189

• Date Filed

  Not available

• Date Issued

  Tuesday, January 28, 1890
  135 years ago

• CPC

  • B23G5/06 - Taps
  • Y10S470/903 - Yieldable spindle
  • Y10T408/9048 - Extending outwardly from tool-axis
  • Y10T408/96 - Miscellaneous

• US Classifications

  • 408 - Cutting by use of rotating axially moving tool
  • 470 - Threaded, headed fastener, or washer making: process and apparatus