2223560

Information

• Patent Grant
• 2223560

• References
• Source

• Patent Number

  2,223,560

• Date Filed

  Not available

• Date Issued

  Tuesday, December 3, 1940
  84 years ago

• CPC

  • B42F13/406 - with means for holding pencils

• US Classifications

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