398926

Information

• Patent Grant
• 398926

• References
• Source

• Patent Number

  398,926

• Date Filed

  Not available

• Date Issued

  Tuesday, March 5, 1889
  136 years ago

• CPC

  • H02J7/20 - due to variation of continuously variable ohmic resistor
  • Y10T307/538 - Tap-changing or variable number of cells

• US Classifications

  • 307 - Electrical transmission or interconnection systems
  • 200 - Electricity: circuit makers and breakers
  • 310 - Electrical generator or motor structure
  • 320 - Electricity: battery or capacitor charging or discharging