3782157

Information

• Patent Grant
• 3782157

• References
• Source

• Patent Number

  3,782,157

• Date Filed

  Not available

• Date Issued

  Tuesday, January 1, 1974
  51 years ago

• CPC

  • B26F1/0038 - from the inside
  • B21D28/28 - in tubes or other hollow bodies
  • B21D28/285 - punching outwards
  • B21D28/36 - using rotatable work or tool holders
  • B21D31/02 - Stabbing or piercing

• US Classifications

  • 072 - Metal deforming