2212578

Information

• Patent Grant
• 2212578

• References
• Source

• Patent Number

  2,212,578

• Date Filed

  Not available

• Date Issued

  Tuesday, August 27, 1940
  85 years ago

• CPC

  • H01J19/78 - One or more circuit elements structurally associated with the tube
  • H01J19/34 - forming part of the envelope
  • H01J2893/0004 - Anodes formed in central part

• US Classifications

  • 315 - Electric lamp and discharge devices: systems
  • 313 - Electric lamp and discharge devices