3884437

Information

• Patent Grant
• 3884437

• References
• Source

• Patent Number

  3,884,437

• Date Filed

  Not available

• Date Issued

  Tuesday, May 20, 1975
  50 years ago

• CPC

  • B61L3/185 - using separate conductors
  • Y02T10/7258 - Optimisation of vehicle performance

• US Classifications

  • 246 - Railway switches and signals
  • 104 - Railways