1904541

Information

• Patent Grant
• 1904541

• References
• Source

• Patent Number

  1,904,541

• Date Filed

  Not available

• Date Issued

  Tuesday, April 18, 1933
  92 years ago

• CPC

  • H05B31/305 - Ignition devices

• US Classifications

  • 314 - Electric lamp and discharge devices: consumable electrodes