1477405

Information

• Patent Grant
• 1477405

• References
• Source

• Patent Number

  1,477,405

• Date Filed

  Not available

• Date Issued

  Tuesday, December 11, 1923
  101 years ago

• CPC

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

• US Classifications

  • 388 - Electricity: motor control systems
  • 318 - Electricity: motive power systems