2220744

Information

• Patent Grant
• 2220744

• References
• Source

• Patent Number

  2,220,744

• Date Filed

  Not available

• Date Issued

  Tuesday, November 5, 1940
  84 years ago

• CPC

  • B61L21/06 - Vehicle-on-line indication Monitoring locking and release of the route
  • B61L7/068 - Protection against eddy-currents, short-circuits, or the like, for electric safety arrangements

• US Classifications

  • 246 - Railway switches and signals