1639877

Information

• Patent Grant
• 1639877

• References
• Source

• Patent Number

  1,639,877

• Date Filed

  Not available

• Date Issued

  Tuesday, August 23, 1927
  97 years ago

• CPC

  • B61L5/125 - Fixed signals, beacons, or the like

• US Classifications

  • 246 - Railway switches and signals