3804531

Information

• Patent Grant
• 3804531

• References
• Source

• Patent Number

  3,804,531

• Date Filed

  Not available

• Date Issued

  Tuesday, April 16, 1974
  51 years ago

• CPC

  • G06G7/75 - for component analysis
  • G01J3/46 - Measurement of colour Colour measuring devices
  • G01J3/462 - Computing operations in or between colour spaces; Colour management systems
  • G01J3/465 - taking into account the colour perception of the eye; using tristimulus detection
  • G01J3/524 - Calibration of colorimeters
  • G01J3/51 - using colour filters
  • G01J3/513 - having fixed filter-detector pairs

• US Classifications

  • 356 - Optics: measuring and testing
  • 250 - Radiant energy
  • 348 - Television