2721932

Information

• Patent Grant
• 2721932

• References
• Source

• Patent Number

  2,721,932

• Date Filed

  Not available

• Date Issued

  Tuesday, October 25, 1955
  69 years ago

• CPC

  • B61L1/185 - Use of direct current
  • B61L21/06 - Vehicle-on-line indication Monitoring locking and release of the route
  • B61L23/22 - for controlling traffic in two directions over the same pair of rails

• US Classifications

  • 246 - Railway switches and signals