3820370

Information

• Patent Grant
• 3820370

• References
• Source

• Patent Number

  3,820,370

• Date Filed

  Not available

• Date Issued

  Friday, June 28, 1974
  52 years ago

• CPC

  • B21D39/14 - with balls
  • B21D17/04 - by rolling

• US Classifications

  • 072 - Metal deforming
  • D08 - Tools and hardware