2520865

Information

• Patent Grant
• 2520865

• References
• Source

• Patent Number

  2,520,865

• Date Filed

  Not available

• Date Issued

  Tuesday, August 29, 1950
  74 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