1901828

Information

• Patent Grant
• 1901828

• References
• Source

• Patent Number

  1,901,828

• Date Filed

  Not available

• Date Issued

  Tuesday, March 14, 1933
  91 years ago

• CPC

  • H02J7/20 - due to variation of continuously variable ohmic resistor

• US Classifications

  • 320 - Electricity: battery or capacitor charging or discharging
  • 335 - Electricity: magnetically operated switches, magnets, and electromagnets
  • 361 - Electricity: electrical systems and devices