2816218

Information

• Patent Grant
• 2816218

• References
• Source

• Patent Number

  2,816,218

• Date Filed

  Not available

• Date Issued

  Tuesday, December 10, 1957
  67 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