3581138

Information

• Patent Grant
• 3581138

• References
• Source

• Patent Number

  3,581,138

• Date Filed

  Not available

• Date Issued

  Tuesday, May 25, 1971
  53 years ago

• CPC

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

• US Classifications

  • 313 - Electric lamp and discharge devices