3879994

Information

• Patent Grant
• 3879994

• References
• Source

• Patent Number

  3,879,994

• Date Filed

  Not available

• Date Issued

  Tuesday, April 29, 1975
  50 years ago

• CPC

  • B21D5/143 - making use of a mandrel
  • B21C37/0815 - without continuous longitudinal movement of the sheet during the bending operation

• US Classifications

  • 072 - Metal deforming