3698221

Information

• Patent Grant
• 3698221

• References
• Source

• Patent Number

  3,698,221

• Date Filed

  Not available

• Date Issued

  Tuesday, October 17, 1972
  52 years ago

• CPC

  • B21D51/36 - collapsible or like thin-walled tubes
  • B21C37/18 - conical tubes

• US Classifications

  • 072 - Metal deforming