1840098

Information

• Patent Grant
• 1840098

• References
• Source

• Patent Number

  1,840,098

• Date Filed

  Not available

• Date Issued

  Tuesday, January 5, 1932
  93 years ago

• CPC

  • B61L5/1845 - Optical systems, lenses

• US Classifications

  • 246 - Railway switches and signals
  • 362 - Illumination
  • D26 - Lighting