3618241

Information

• Patent Grant
• 3618241

• References
• Source

• Patent Number

  3,618,241

• Date Filed

  Not available

• Date Issued

  Tuesday, November 9, 1971
  53 years ago

• CPC

  • B42F13/0033 - with two or more filing appliances

• US Classifications

  • 040 - Card, picture, or sign exhibiting
  • 281 - Books, strips, and leaves