2111506

Information

• Patent Grant
• 2111506

• References
• Source

• Patent Number

  2,111,506

• Date Filed

  Not available

• Date Issued

  Tuesday, March 15, 1938
  86 years ago

• CPC

  • H01J17/063 - Indirectly heated cathodes

• US Classifications

  • 313 - Electric lamp and discharge devices
  • 338 - Electrical resistors