3691368

Information

• Patent Grant
• 3691368

• References
• Source

• Patent Number

  3,691,368

• Date Filed

  Not available

• Date Issued

  Tuesday, September 12, 1972
  52 years ago

• CPC

  • B61L13/002 - actuated by the passage of the vehicle

• US Classifications

  • 246 - Railway switches and signals