3148309

Information

• Patent Grant
• 3148309

• References
• Source

• Patent Number

  3,148,309

• Date Filed

  Not available

• Date Issued

  Tuesday, September 8, 1964
  60 years ago

• CPC

  • H02H3/307 - involving comparison of quantities derived from a plurality of phases

• US Classifications

  • 361 - Electricity: electrical systems and devices