406857

Information

• Patent Grant
• 406857

• References
• Source

• Patent Number

  406,857

• Date Filed

  Not available

• Date Issued

  Tuesday, July 9, 1889
  135 years ago

• CPC

  • B23G5/12 - self-releasing
  • Y10T279/1933 - Worm
  • Y10T408/85915 - with means to rotate scroll

• US Classifications

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