1821039

Information

• Patent Grant
• 1821039

• References
• Source

• Patent Number

  1,821,039

• Date Filed

  Not available

• Date Issued

  Tuesday, September 1, 1931
  93 years ago

• CPC

  • B61L1/14 - Devices for indicating the passing of the end of the vehicle or vehicle train

• US Classifications

  • 246 - Railway switches and signals