2247506

Information

• Patent Grant
• 2247506

• References
• Source

• Patent Number

  2,247,506

• Date Filed

  Not available

• Date Issued

  Tuesday, July 1, 1941
  84 years ago

• CPC

  • H02P1/34 - by progressive reduction of impedance in secondary circuit

• US Classifications

  • 388 - Electricity: motor control systems
  • 307 - Electrical transmission or interconnection systems
  • 318 - Electricity: motive power systems
  • 361 - Electricity: electrical systems and devices