1956325

Information

• Patent Grant
• 1956325

• References
• Source

• Patent Number

  1,956,325

• Date Filed

  Not available

• Date Issued

  Tuesday, April 24, 1934
  90 years ago

• CPC

  • B42F19/00 - File cards
  • Y10S229/928 - Expandable envelope

• US Classifications

  • 229 - Envelopes, wrappers, and paperboard boxes