1785694

Information

• Patent Grant
• 1785694

• References
• Source

• Patent Number

  1,785,694

• Date Filed

  Not available

• Date Issued

  Tuesday, December 16, 1930
  94 years ago

• CPC

  • B61L7/10 - for light signals

• US Classifications

  • 246 - Railway switches and signals
  • 340 - Communications: electrical
  • 362 - Illumination