3868641

Information

• Patent Grant
• 3868641

• References
• Source

• Patent Number

  3,868,641

• Date Filed

  Not available

• Date Issued

  Tuesday, February 25, 1975
  49 years ago

• CPC

  • B61L19/06 - Interlocking devices having electrical operation
  • B61L7/10 - for light signals

• US Classifications

  • 246 - Railway switches and signals