3897615

Information

• Patent Grant
• 3897615

• References
• Source

• Patent Number

  3,897,615

• Date Filed

  Not available

• Date Issued

  Tuesday, August 5, 1975
  49 years ago

• CPC

  • H01J17/49 - Display panels
  • H01J2893/0069 - Tubes for displaying characters

• US Classifications

  • 445 - Electric lamp or space discharge component or device manufacturing
  • 174 - Electricity: conductors and insulators
  • 313 - Electric lamp and discharge devices