2309747

Information

• Patent Grant
• 2309747

• References
• Source

• Patent Number

  2,309,747

• Date Filed

  Not available

• Date Issued

  Tuesday, January 26, 1943
  81 years ago

• CPC

  • B61L3/10 - using current passing between devices along the route and devices on the vehicle train

• US Classifications

  • 246 - Railway switches and signals
  • 370 - Multiplex communications
  • 381 - Electrical audio signal processing systems and devices
  • 455 - Telecommunications