3307032

Information

• Patent Grant
• 3307032

• References
• Source

• Patent Number

  3,307,032

• Date Filed

  Not available

• Date Issued

  Tuesday, February 28, 1967
  57 years ago

• CPC

  • B61L29/226 - using track-circuits, closed or short-circuited by train or using isolated rail-sections
  • B61L1/18 - Railway track circuits
  • B61L1/187 - Use of alternating current
  • B61L23/166 - using alternating current

• US Classifications

  • 246 - Railway switches and signals