1840860

Information

• Patent Grant
• 1840860

• References
• Source

• Patent Number

  1,840,860

• Date Filed

  Not available

• Date Issued

  Tuesday, January 12, 1932
  93 years ago

• CPC

  • H05B31/0006 - with superimposed electrodes

• US Classifications

  • 362 - Illumination
  • 314 - Electric lamp and discharge devices: consumable electrodes