2421487

Information

• Patent Grant
• 2421487

• References
• Source

• Patent Number

  2,421,487

• Date Filed

  Not available

• Date Issued

  Tuesday, June 3, 1947
  77 years ago

• CPC

  • B42D5/008 - with means for engaging sheet perforations or slots
  • B42D5/001 - perforated or punched sheets
  • B42D5/005 - Supports for note-pads

• US Classifications

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