1949397

Information

• Patent Grant
• 1949397

• References
• Source

• Patent Number

  1,949,397

• Date Filed

  Not available

• Date Issued

  Tuesday, February 27, 1934
  90 years ago

• CPC

  • H01J19/34 - forming part of the envelope
  • H01J2893/0004 - Anodes formed in central part

• US Classifications

  • 313 - Electric lamp and discharge devices