1918231

Information

• Patent Grant
• 1918231

• References
• Source

• Patent Number

  1,918,231

• Date Filed

  Not available

• Date Issued

  Tuesday, July 11, 1933
  91 years ago

• CPC

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

• US Classifications

  • 246 - Railway switches and signals