2251575

Information

• Patent Grant
• 2251575

• References
• Source

• Patent Number

  2,251,575

• Date Filed

  Not available

• Date Issued

  Tuesday, August 5, 1941
  83 years ago

• CPC

  • B61L3/10 - using current passing between devices along the route and devices on the vehicle train
  • B61L3/121 - using magnetic induction

• US Classifications

  • 246 - Railway switches and signals