2399003

Information

• Patent Grant
• 2399003

• References
• Source

• Patent Number

  2,399,003

• Date Filed

  Not available

• Date Issued

  Tuesday, April 23, 1946
  78 years ago

• CPC

  • H01J17/063 - Indirectly heated cathodes

• US Classifications

  • 313 - Electric lamp and discharge devices