2185381

Information

• Patent Grant
• 2185381

• References
• Source

• Patent Number

  2,185,381

• Date Filed

  Not available

• Date Issued

  Tuesday, January 2, 1940
  85 years ago

• CPC

  • B21D53/08 - of both metal tubes and sheet metal
  • B22C9/26 - for ribbed tubes for radiators

• US Classifications

  • 072 - Metal deforming