339253

Information

• Patent Grant
• 339253

• References
• Source

• Patent Number

  339,253

• Date Filed

  Not available

• Date Issued

  Tuesday, April 6, 1886
  138 years ago

• CPC

  • H01K9/02 - to provide substitution in the event of failure of one of the bodies

• US Classifications

  • 315 - Electric lamp and discharge devices: systems
  • 362 - Illumination