1936260

Information

• Patent Grant
• 1936260

• References
• Source

• Patent Number

  1,936,260

• Date Filed

  Not available

• Date Issued

  Tuesday, November 21, 1933
  91 years ago

• CPC

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

• US Classifications

  • 246 - Railway switches and signals
  • 362 - Illumination