1425640

Information

• Patent Grant
• 1425640

• References
• Source

• Patent Number

  1,425,640

• Date Filed

  Not available

• Date Issued

  Tuesday, August 15, 1922
  102 years ago

• CPC

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

• US Classifications

  • 318 - Electricity: motive power systems