3737657

Information

• Patent Grant
• 3737657

• References
• Source

• Patent Number

  3,737,657

• Date Filed

  Not available

• Date Issued

  Tuesday, June 5, 1973
  51 years ago

• CPC

  • E01B7/08 - Other constructions of tongues

• US Classifications

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