3091688

Information

• Patent Grant
• 3091688

• References
• Source

• Patent Number

  3,091,688

• Date Filed

  Not available

• Date Issued

  Tuesday, May 28, 1963
  61 years ago

• CPC

  • B61L17/023 - Signalling; Signals with multiple indicating means
  • B61L17/00 - Switching systems for classification yards

• US Classifications

  • 246 - Railway switches and signals
  • 327 - Miscellaneous active electrical nonlinear devices, circuits, and systems