3271988

Information

• Patent Grant
• 3271988

• References
• Source

• Patent Number

  3,271,988

• Date Filed

  Not available

• Date Issued

  Tuesday, September 13, 1966
  58 years ago

• CPC

  • B21D28/28 - in tubes or other hollow bodies
  • B21D28/285 - punching outwards
  • Y10T83/0581 - Cutting part way through from opposite sides of work
  • Y10T83/0596 - Cutting wall of hollow work
  • Y10T83/398 - Internal tool is an active cutter

• US Classifications

  • 072 - Metal deforming
  • 083 - Cutting