2365474

Information

• Patent Grant
• 2365474

• References
• Source

• Patent Number

  2,365,474

• Date Filed

  Not available

• Date Issued

  Tuesday, December 19, 1944
  80 years ago

• CPC

  • B61L5/1836 - using light sources of different colours and seperate optical systems

• US Classifications

  • 246 - Railway switches and signals
  • 340 - Communications: electrical
  • 359 - Optical: systems and elements
  • 362 - Illumination