2193661

Information

• Patent Grant
• 2193661

• References
• Source

• Patent Number

  2,193,661

• Date Filed

  Not available

• Date Issued

  Tuesday, March 12, 1940
  84 years ago

• CPC

  • B21F37/02 - of resilient rings
  • B21D53/22 - with means for preventing rotation

• US Classifications

  • 411 - Expanded, threaded, driven, headed, tool-deformed, or locked-threaded fastener
  • 470 - Threaded, headed fastener, or washer making: process and apparatus