1306539

Information

• Patent Grant
• 1306539

• References
• Source

• Patent Number

  1,306,539

• Date Filed

  Not available

• Date Issued

  Tuesday, June 10, 1919
  105 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
  • 318 - Electricity: motive power systems