3312875

Information

• Patent Grant
• 3312875

• References
• Source

• Patent Number

  3,312,875

• Date Filed

  Not available

• Date Issued

  Tuesday, April 4, 1967
  57 years ago

• CPC

  • H02H3/347 - using summation current transformers
  • H02H1/063 - primary power being supplied by fault current
  • H02J13/0041 - using lamps or electromechanical means
  • H03K17/73 - for dc voltages or currents

• US Classifications

  • 361 - Electricity: electrical systems and devices
  • 327 - Miscellaneous active electrical nonlinear devices, circuits, and systems
  • 340 - Communications: electrical