1114684

Information

• Patent Grant
• 1114684

• References
• Source

• Patent Number

  1,114,684

• Date Filed

  Not available

• Date Issued

  Tuesday, October 20, 1914
  110 years ago

• CPC

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

• US Classifications

  • 246 - Railway switches and signals