2639370

Information

• Patent Grant
• 2639370

• References
• Source

• Patent Number

  2,639,370

• Date Filed

  Not available

• Date Issued

  Tuesday, May 19, 1953
  71 years ago

• CPC

  • B61L7/103 - Electric control of the setting of signals

• US Classifications

  • 246 - Railway switches and signals
  • 307 - Electrical transmission or interconnection systems