1223428

Information

• Patent Grant
• 1223428

• References
• Source

• Patent Number

  1,223,428

• Date Filed

  Not available

• Date Issued

  Tuesday, April 24, 1917
  107 years ago

• CPC

  • H01J13/50 - Tubes having a single main anode
  • H01J13/56 - Tubes having two or more main anodes
  • H01J2893/0088 - Tubes with at least a solid principal cathode and solid anodes

• US Classifications

  • 313 - Electric lamp and discharge devices