1521866

Information

• Patent Grant
• 1521866

• References
• Source

• Patent Number

  1,521,866

• Date Filed

  Not available

• Date Issued

  Tuesday, January 6, 1925
  100 years ago

• CPC

  • B21D28/285 - punching outwards
  • B21D28/28 - in tubes or other hollow bodies
  • Y10T83/386 - With expanding mandrel
  • Y10T83/398 - Internal tool is an active cutter

• US Classifications

  • 083 - Cutting