3213660

Information

• Patent Grant
• 3213660

• References
• Source

• Patent Number

  3,213,660

• Date Filed

  Not available

• Date Issued

  Tuesday, October 26, 1965
  59 years ago

• CPC

  • B21F3/06 - internally on a hollow form
  • B21F3/04 - externally on a mandrel or the like

• US Classifications

  • 072 - Metal deforming
  • 140 - Wireworking