3323340

Information

• Patent Grant
• 3323340

• References
• Source

• Patent Number

  3,323,340

• Date Filed

  Not available

• Date Issued

  Tuesday, June 6, 1967
  57 years ago

• CPC

  • B21F3/06 - internally on a hollow form
  • B21F99/00 - Subject matter not provided for in other groups of this subclass
  • Y10S29/046 - Vibration
  • Y10T29/49609 - Spring making

• US Classifications

  • 072 - Metal deforming
  • 029 - Metal working
  • 148 - Metal treatment