908654

Information

• Patent Grant
• 908654

• References
• Source

• Patent Number

  908,654

• Date Filed

  Not available

• Date Issued

  Tuesday, January 5, 1909
  116 years ago

• CPC

  • B61L5/1827 - using light sources of different colours and a common optical system

• US Classifications

  • 246 - Railway switches and signals