2481621

Information

• Patent Grant
• 2481621

• References
• Source

• Patent Number

  2,481,621

• Date Filed

  Not available

• Date Issued

  Tuesday, September 13, 1949
  75 years ago

• CPC

  • H01J31/24 - with screen acting as light valve by shutter operation

• US Classifications

  • 348 - Television
  • 313 - Electric lamp and discharge devices
  • 359 - Optical: systems and elements