1389332

Information

• Patent Grant
• 1389332

• References
• Source

• Patent Number

  1,389,332

• Date Filed

  Not available

• Date Issued

  Tuesday, August 30, 1921
  103 years ago

• CPC

  • H02J7/20 - due to variation of continuously variable ohmic resistor
  • Y10S320/36 - Distribution system

• US Classifications

  • 320 - Electricity: battery or capacitor charging or discharging
  • 307 - Electrical transmission or interconnection systems