2013419

Information

• Patent Grant
• 2013419

• References
• Source

• Patent Number

  2,013,419

• Date Filed

  Not available

• Date Issued

  Tuesday, September 3, 1935
  89 years ago

• CPC

  • H01J19/30 - characterised by the material
  • H01J2893/0021 - carbon

• US Classifications

  • 313 - Electric lamp and discharge devices