3606557

Information

• Patent Grant
• 3606557

• References
• Source

• Patent Number

  3,606,557

• Date Filed

  Not available

• Date Issued

  Monday, September 20, 1971
  53 years ago

• CPC

  • B42F13/0086 - Auxiliary ring supports on covers
  • B42F13/26 - and locked when so engaged

• US Classifications

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