3318311

Information

• Patent Grant
• 3318311

• References
• Source

• Patent Number

  3,318,311

• Date Filed

  Not available

• Date Issued

  Tuesday, May 9, 1967
  58 years ago

• CPC

  • B42F13/12 - with pillars, posts, rods, or tubes
  • Y10S402/501 - Sheet retainer continuous with periphery of sheet notch

• US Classifications

  • 281 - Books, strips, and leaves
  • 040 - Card, picture, or sign exhibiting
  • 402 - Binder device releasably engaging aperture or notch of sheet
  • D19 - Office supplies