1923709

Information

• Patent Grant
• 1923709

• References
• Source

• Patent Number

  1,923,709

• Date Filed

  Not available

• Date Issued

  Tuesday, August 22, 1933
  90 years ago

• CPC

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

• US Classifications

  • 307 - Electrical transmission or interconnection systems