1664519

Information

• Patent Grant
• 1664519

• References
• Source

• Patent Number

  1,664,519

• Date Filed

  Not available

• Date Issued

  Tuesday, April 3, 1928
  97 years ago

• CPC

  • H02J7/18 - due to variation of ohmic resistance in field circuit, using resistance switching in or out of circuit step by step

• US Classifications

  • 307 - Electrical transmission or interconnection systems