2807663

Information

• Patent Grant
• 2807663

• References
• Source

• Patent Number

  2,807,663

• Date Filed

  Not available

• Date Issued

  Tuesday, September 24, 1957
  67 years ago

• CPC

  • G06K9/74 - Arrangements for recognition using optical reference masks
  • B41B19/06 - at different predetermined places
  • H01J31/16 - with mask carrying a number of selectively displayable signs
  • H04L17/30 - using electric or electronic translation
  • H04L25/4902 - Pulse width modulation; Pulse position modulation

• US Classifications

  • 178 - Telegraphy
  • 307 - Electrical transmission or interconnection systems
  • 315 - Electric lamp and discharge devices: systems
  • 327 - Miscellaneous active electrical nonlinear devices, circuits, and systems
  • 345 - Computer graphics processing and selective visual display systems
  • 347 - Incremental printing of symbolic information
  • 358 - Facsimile and static presentation processing