3172012

Information

• Patent Grant
• 3172012

• References
• Source

• Patent Number

  3,172,012

• Date Filed

  Not available

• Date Issued

  Tuesday, March 2, 1965
  60 years ago

• CPC

  • H02H3/343 - using phase sequence analysers
  • H01H53/10 - Induction relays

• US Classifications

  • 361 - Electricity: electrical systems and devices
  • 324 - Electricity: measuring and testing