3857057

Information

• Patent Grant
• 3857057

• References
• Source

• Patent Number

  3,857,057

• Date Filed

  Not available

• Date Issued

  Tuesday, December 24, 1974
  50 years ago

• CPC

  • H04N9/285 - using quadrupole lenses
  • H01J29/703 - Static convergence systems

• US Classifications

  • 313 - Electric lamp and discharge devices
  • 348 - Television