1457851

Information

• Patent Grant
• 1457851

• References
• Source

• Patent Number

  1,457,851

• Date Filed

  Not available

• Date Issued

  Tuesday, June 5, 1923
  102 years ago

• CPC

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

• US Classifications

  • 338 - Electrical resistors
  • 322 - Electricity: single generator systems
  • 324 - Electricity: measuring and testing
  • 361 - Electricity: electrical systems and devices