2188661

Information

• Patent Grant
• 2188661

• References
• Source

• Patent Number

  2,188,661

• Date Filed

  Not available

• Date Issued

  Tuesday, January 30, 1940
  84 years ago

• CPC

  • H01J29/86 - Vessels Containers Vacuum locks
  • H01J29/006 - Arrangements for eliminating unwanted temperature effects
  • H01J29/24 - Supports for luminescent material
  • H01J2229/0069 - Active means
  • H01J2229/0092 - Passive means

• US Classifications

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