2487641

Information

• Patent Grant
• 2487641

• References
• Source

• Patent Number

  2,487,641

• Date Filed

  Not available

• Date Issued

  Tuesday, November 8, 1949
  74 years ago

• CPC

  • H04N3/122 - using cathode rays
  • A63F13/04 - for aiming at specific areas on the displays

• US Classifications

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