2813998

Information

• Patent Grant
• 2813998

• References
• Source

• Patent Number

  2,813,998

• Date Filed

  Not available

• Date Issued

  Tuesday, November 19, 1957
  68 years ago

• CPC

  • H01J31/62 - with separate reading and writing rays

• US Classifications

  • 315 - Electric lamp and discharge devices: systems
  • 313 - Electric lamp and discharge devices