2693807

Information

• Patent Grant
• 2693807

• References
• Source

• Patent Number

  2,693,807

• Date Filed

  Not available

• Date Issued

  Tuesday, November 9, 1954
  70 years ago

• CPC

  • G02B27/0149 - characterised by mechanical features
  • B42F21/10 - represented by slits

• US Classifications

  • 040 - Card, picture, or sign exhibiting
  • D19 - Office supplies