1338419

Information

• Patent Grant
• 1338419

• References
• Source

• Patent Number

  1,338,419

• Date Filed

  Not available

• Date Issued

  Tuesday, April 27, 1920
  104 years ago

• CPC

  • B21K23/00 - Making other articles
  • B21C37/20 - Making helical or similar guides in or on tubes without removing material
  • B21D13/02 - by pressing
  • B21D51/02 - characterised by the structure of the objects
  • Y10T29/49387 - Boiler making

• US Classifications

  • 072 - Metal deforming
  • 029 - Metal working