3837680

Information

• Patent Grant
• 3837680

• References
• Source

• Patent Number

  3,837,680

• Date Filed

  Not available

• Date Issued

  Tuesday, September 24, 1974
  50 years ago

• CPC

  • B42F13/0033 - with two or more filing appliances

• US Classifications

  • 281 - Books, strips, and leaves
  • 402 - Binder device releasably engaging aperture or notch of sheet