3518422

Information

• Patent Grant
• 3518422

• References
• Source

• Patent Number

  3,518,422

• Date Filed

  Not available

• Date Issued

  Tuesday, June 30, 1970
  55 years ago

• CPC

  • B61L25/046 - using magnetic tags

• US Classifications

  • 246 - Railway switches and signals
  • 104 - Railways