1822421

Information

• Patent Grant
• 1822421

• References
• Source

• Patent Number

  1,822,421

• Date Filed

  Not available

• Date Issued

  Tuesday, September 8, 1931
  94 years ago

• CPC

  • B42F19/00 - File cards
  • B42F19/04 - with receptacles or other holding devices

• US Classifications

  • 040 - Card, picture, or sign exhibiting