3401557

Information

• Patent Grant
• 3401557

• References
• Source

• Patent Number

  3,401,557

• Date Filed

  Not available

• Date Issued

  Tuesday, September 17, 1968
  56 years ago

• CPC

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

• US Classifications

  • 072 - Metal deforming