1875587

Information

• Patent Grant
• 1875587

• References
• Source

• Patent Number

  1,875,587

• Date Filed

  Not available

• Date Issued

  Tuesday, September 6, 1932
  92 years ago

• CPC

  • B61L17/023 - Signalling; Signals with multiple indicating means

• US Classifications

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