1933858

Information

• Patent Grant
• 1933858

• References
• Source

• Patent Number

  1,933,858

• Date Filed

  Not available

• Date Issued

  Tuesday, November 7, 1933
  91 years ago

• CPC

  • H02P9/20 - due to variation of continuously-variable ohmic resistance

• US Classifications

  • 322 - Electricity: single generator systems
  • 307 - Electrical transmission or interconnection systems
  • 318 - Electricity: motive power systems