2030781

Information

• Patent Grant
• 2030781

• References
• Source

• Patent Number

  2,030,781

• Date Filed

  Not available

• Date Issued

  Tuesday, February 11, 1936
  88 years ago

• CPC

  • H01J7/42 - Means structurally associated with the tube or lamp for indicating defects or previous use

• US Classifications

  • 315 - Electric lamp and discharge devices: systems
  • 313 - Electric lamp and discharge devices
  • 445 - Electric lamp or space discharge component or device manufacturing