920654

Information

• Patent Grant
• 920654

• References
• Source

• Patent Number

  920,654

• Date Filed

  Not available

• Date Issued

  Tuesday, May 4, 1909
  115 years ago

• CPC

  • B61L25/065 - for signalling systems on the vehicle using current conduction

• US Classifications

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