617664

Information

• Patent Grant
• 617664

• References
• Source

• Patent Number

  617,664

• Date Filed

  Not available

• Date Issued

  Tuesday, January 10, 1899
  126 years ago

• CPC

  • B61L1/20 - Safety arrangements for preventing or indicating malfunction of the device
  • Y10S200/13 - Shaft bearing and armature wear indicator switches

• US Classifications

  • 246 - Railway switches and signals
  • 200 - Electricity: circuit makers and breakers
  • 340 - Communications: electrical