1878085

Information

• Patent Grant
• 1878085

• References
• Source

• Patent Number

  1,878,085

• Date Filed

  Not available

• Date Issued

  Tuesday, September 20, 1932
  92 years ago

• CPC

  • B61L7/083 - Common line wire control using currents of different amplitudes, polarities, frequencies, or the like

• US Classifications

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