1640913

Information

• Patent Grant
• 1640913

• References
• Source

• Patent Number

  1,640,913

• Date Filed

  Not available

• Date Issued

  Tuesday, August 30, 1927
  97 years ago

• CPC

  • H05B31/0009 - with parallel or oblique disposition of the electrodes; Special form of the electrodes

• US Classifications

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