3909684

Information

• Patent Grant
• 3909684

• References
• Source

• Patent Number

  3,909,684

• Date Filed

  Not available

• Date Issued

  Tuesday, September 30, 1975
  49 years ago

• CPC

  • H02P25/024 - controlled by supply frequency
  • Y10S505/852 - Electric motor control

• US Classifications

  • 318 - Electricity: motive power systems
  • 505 - Superconductor technology: apparatus, material, process