2215437

Information

• Patent Grant
• 2215437

• References
• Source

• Patent Number

  2,215,437

• Date Filed

  Not available

• Date Issued

  Tuesday, September 17, 1940
  84 years ago

• CPC

  • B61L7/088 - Common line wire control using series of coded pulses
  • B61L7/083 - Common line wire control using currents of different amplitudes, polarities, frequencies, or the like

• US Classifications

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