407915

Information

• Patent Grant
• 407915

• References
• Source

• Patent Number

  407,915

• Date Filed

  Not available

• Date Issued

  Tuesday, July 30, 1889
  135 years ago

• CPC

  • H05B31/14 - Metal electrodes

• US Classifications

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