3471689

Information

• Patent Grant
• 3471689

• References
• Source

• Patent Number

  3,471,689

• Date Filed

  Not available

• Date Issued

  Tuesday, October 7, 1969
  55 years ago

• CPC

  • B61L29/288 - Wiring diagram of the signal control circuits

• US Classifications

  • 246 - Railway switches and signals