1970839

Information

• Patent Grant
• 1970839

• References
• Source

• Patent Number

  1,970,839

• Date Filed

  Not available

• Date Issued

  Tuesday, August 21, 1934
  90 years ago

• CPC

  • B42D5/06 - Tear-off calendar blocks
  • B42D5/041 - with means for engaging calendar sheet perforations or slots
  • B42D5/042 - Diaries; Memorandum calendars
  • B42F13/40 - combined or formed with other articles

• US Classifications

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