2984921

Information

• Patent Grant
• 2984921

• References
• Source

• Patent Number

  2,984,921

• Date Filed

  Not available

• Date Issued

  Tuesday, May 23, 1961
  63 years ago

• CPC

  • G06K19/022 - Processes or apparatus therefor
  • B42F19/00 - File cards
  • G03B21/64 - Means for mounting individual pictures to be projected
  • G06K19/02 - characterised by the selection of materials
  • Y10S493/944 - Aperture card or display device with window

• US Classifications

  • 040 - Card, picture, or sign exhibiting
  • 235 - Registers
  • 493 - Manufacturing container or tube from paper