3866274

Information

• Patent Grant
• 3866274

• References
• Source

• Patent Number

  3,866,274

• Date Filed

  Not available

• Date Issued

  Tuesday, February 18, 1975
  50 years ago

• CPC

  • B42B5/08 - by finger, claw or ring-like elements passing through the sheets, quires or signatures
  • Y10T24/20 - Paper fastener
  • Y10T24/209 - Paper-penetrating
  • Y10T24/50 - Readily interlocking, two-part fastener requiring either destructive or tool disengagement

• US Classifications

  • 281 - Books, strips, and leaves
  • 024 - Buckles, buttons, clasps, etc.
  • 402 - Binder device releasably engaging aperture or notch of sheet