1820440

Information

• Patent Grant
• 1820440

• References
• Source

• Patent Number

  1,820,440

• Date Filed

  Not available

• Date Issued

  Tuesday, August 25, 1931
  93 years ago

• CPC

  • B21D53/00 - Making other particular articles
  • B41J25/22 - for aligning characters for impression

• US Classifications

  • 072 - Metal deforming