1621806

Information

• Patent Grant
• 1621806

• References
• Source

• Patent Number

  1,621,806

• Date Filed

  Not available

• Date Issued

  Tuesday, March 22, 1927
  97 years ago

• CPC

  • B42F13/12 - with pillars, posts, rods, or tubes
  • Y10T29/53674 - Loose-leaf sheet binder

• US Classifications

  • 402 - Binder device releasably engaging aperture or notch of sheet
  • 029 - Metal working