3893643

Information

• Patent Grant
• 3893643

• References
• Source

• Patent Number

  3,893,643

• Date Filed

  Not available

• Date Issued

  Tuesday, July 8, 1975
  49 years ago

• CPC

  • E01B7/20 - Safety means for switches

• US Classifications

  • 246 - Railway switches and signals
  • 238 - Railways: surface track