1551970

Information

• Patent Grant
• 1551970

• References
• Source

• Patent Number

  1,551,970

• Date Filed

  Not available

• Date Issued

  Tuesday, September 1, 1925
  99 years ago

• CPC

  • H02M1/065 - for discharge tubes

• US Classifications

  • 315 - Electric lamp and discharge devices: systems
  • 218 - High-voltage switches with arc preventing or extinguishing devices
  • 313 - Electric lamp and discharge devices
  • 361 - Electricity: electrical systems and devices