2577950

Information

• Patent Grant
• 2577950

• References
• Source

• Patent Number

  2,577,950

• Date Filed

  Not available

• Date Issued

  Tuesday, December 11, 1951
  73 years ago

• CPC

  • B61L3/08 - controlling electrically

• US Classifications

  • 246 - Railway switches and signals
  • 116 - Signals and indicators
  • 318 - Electricity: motive power systems
  • 346 - Recorders