2468815

Information

• Patent Grant
• 2468815

• References
• Source

• Patent Number

  2,468,815

• Date Filed

  Not available

• Date Issued

  Tuesday, May 3, 1949
  75 years ago

• CPC

  • B61L5/1818 - using mobile coloured screen

• US Classifications

  • 361 - Electricity: electrical systems and devices
  • 246 - Railway switches and signals
  • 362 - Illumination