3340721

Information

• Patent Grant
• 3340721

• References
• Source

• Patent Number

  3,340,721

• Date Filed

  Not available

• Date Issued

  Tuesday, September 12, 1967
  57 years ago

• CPC

  • B21D11/085 - by locally stretching or upsetting

• US Classifications

  • 072 - Metal deforming