3576563

Information

• Patent Grant
• 3576563

• References
• Source

• Patent Number

  3,576,563

• Date Filed

  Not available

• Date Issued

  Tuesday, April 27, 1971
  53 years ago

• CPC

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

• US Classifications

  • 385 - Optical waveguides
  • 246 - Railway switches and signals