2211761

Information

• Patent Grant
• 2211761

• References
• Source

• Patent Number

  2,211,761

• Date Filed

  Not available

• Date Issued

  Tuesday, August 20, 1940
  84 years ago

• CPC

  • B21F3/06 - internally on a hollow form
  • B21D53/20 - washers
  • Y10T29/1163 - with means to rotate and store stock supply
  • Y10T29/49609 - Spring making

• US Classifications

  • 029 - Metal working