1553069

Information

• Patent Grant
• 1553069

• References
• Source

• Patent Number

  1,553,069

• Date Filed

  Not available

• Date Issued

  Tuesday, September 8, 1925
  99 years ago

• CPC

  • H02P1/34 - by progressive reduction of impedance in secondary circuit

• US Classifications

  • 335 - Electricity: magnetically operated switches, magnets, and electromagnets