2793361

Information

• Patent Grant
• 2793361

• References
• Source

• Patent Number

  2,793,361

• Date Filed

  Not available

• Date Issued

  Tuesday, May 21, 1957
  67 years ago

• CPC

  • G02B27/281 - used for attenuating light intensity
  • G01R13/202 - Non-electric appliances
  • H04N5/72 - Modifying the appearance of television pictures by optical filters or diffusing screens

• US Classifications

  • 348 - Television
  • 359 - Optical: systems and elements
  • 362 - Illumination