2172727

Information

• Patent Grant
• 2172727

• References
• Source

• Patent Number

  2,172,727

• Date Filed

  Not available

• Date Issued

  Tuesday, September 12, 1939
  85 years ago

• CPC

  • H01J31/265 - with light spot scanning

• US Classifications

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