3719161

Information

• Patent Grant
• 3719161

• References
• Source

• Patent Number

  3,719,161

• Date Filed

  Not available

• Date Issued

  Tuesday, March 6, 1973
  51 years ago

• CPC

  • B42D9/00 - Bookmarkers Spot indicators Devices for holding books open Leaf turners
  • B42F3/003 - Perforated or punched sheets
  • Y10S281/01 - Magnet

• US Classifications

  • 116 - Signals and indicators
  • 040 - Card, picture, or sign exhibiting
  • 281 - Books, strips, and leaves
  • 402 - Binder device releasably engaging aperture or notch of sheet