3813489

Information

• Patent Grant
• 3813489

• References
• Source

• Patent Number

  3,813,489

• Date Filed

  Not available

• Date Issued

  Tuesday, May 28, 1974
  50 years ago

• CPC

  • H01J31/38 - Tubes with photoconductive screen
  • H01J31/36 - Tubes with image amplification section
  • H04N5/228 - Circuit details for pick-up tubes

• US Classifications

  • 348 - Television
  • 250 - Radiant energy
  • 315 - Electric lamp and discharge devices: systems