2571894

Information

• Patent Grant
• 2571894

• References
• Source

• Patent Number

  2,571,894

• Date Filed

  Not available

• Date Issued

  Tuesday, October 16, 1951
  73 years ago

• CPC

  • B61L5/1827 - using light sources of different colours and a common optical system
  • F21S48/1225 - Type of refractor, transparent cover plates or filters
  • F21S48/1726 - by changing the light transmissivity of the refractors, filters or transparent cover plates
  • F21V9/12 - with liquid-filled chambers
  • F21W2101/02 - for land vehicles

• US Classifications

  • 116 - Signals and indicators
  • 359 - Optical: systems and elements
  • 362 - Illumination